bugzilla-data-medium.json

{"bugs":[{"summary":"animated images inside visibility:hidden still eat CPU","op_sys":"All","creation_time":"2010-04-18T03:14:10Z","last_change_time":"2024-02-20T05:25:50Z","id":560067,"status":"ASSIGNED","severity":"S3","keywords":["leave-open","perf","perf:resource-use","power"],"component":"Layout","priority":"--"},{"component":"Performance","priority":"P1","keywords":["perf:pageload"],"severity":"S3","creation_time":"2019-04-11T18:20:49Z","op_sys":"Android","summary":"m.facebook.com live site loads 1s slower in Fenix/GVE than Fennec 64","status":"ASSIGNED","id":1543783,"last_change_time":"2024-04-08T18:36:30Z"},{"creation_time":"2020-04-21T20:35:58Z","op_sys":"Unspecified","summary":"move system addons into builtins in omni.ja","status":"ASSIGNED","id":1631932,"last_change_time":"2024-12-18T18:39:46Z","component":"General","priority":"P3","keywords":["perf","perf:startup"],"severity":"N/A"},{"status":"ASSIGNED","id":1917184,"last_change_time":"2024-12-19T06:19:03Z","creation_time":"2024-09-06T08:07:25Z","op_sys":"Unspecified","summary":"MemoryTelemetry::GatherReports should not run in idle processes","component":"XPCOM","priority":"P2","keywords":["perf:resource-use","regression"],"severity":"S2"},{"severity":"S3","keywords":[],"component":"JavaScript Engine: JIT","priority":"P3","last_change_time":"2024-11-19T16:44:36Z","id":1922073,"status":"ASSIGNED","op_sys":"Android","summary":"js::jit::GenerateCode spends a lot of time in malloc lock contention","creation_time":"2024-10-01T18:43:40Z"},{"op_sys":"All","summary":"CSS parsing is 5.5% of startup time","creation_time":"2001-07-18T04:11:33Z","last_change_time":"2024-08-15T14:01:50Z","id":91242,"status":"NEW","severity":"S3","keywords":["arch","perf","perf:startup"],"component":"CSS Parsing and Computation","priority":"P3"},{"keywords":["perf"],"severity":"S3","component":"Layout","priority":"--","last_change_time":"2023-05-15T19:04:00Z","status":"NEW","id":216418,"op_sys":"All","summary":"Page with lots of <pre> text (or rather: extremely deeply-nested inline tags, with lots of linebreaks) uses lots of memory in layout arenas and is slow to load","creation_time":"2003-08-17T03:26:28Z"},{"component":"Graphics: ImageLib","priority":"--","severity":"S3","keywords":["perf:pageload","perf:resource-use","perf:responsiveness","reproducible"],"status":"NEW","id":304683,"last_change_time":"2024-09-04T13:05:12Z","creation_time":"2005-08-15T08:01:49Z","summary":"firefox struggles with large doxygen html file in nsLocalFile::GetLastModifiedTime (from imgLoader)","op_sys":"All"},{"op_sys":"All","summary":"Write a new off-the-main-thread IO driver for expat","creation_time":"2011-04-19T08:20:35Z","last_change_time":"2023-08-23T01:33:13Z","id":651049,"status":"NEW","severity":"S3","keywords":["perf:pageload"],"priority":"--","component":"XML"},{"severity":"S3","keywords":["perf:pageload","perf:resource-use","reproducible","testcase-wanted"],"priority":"--","component":"Graphics: ImageLib","op_sys":"All","summary":"Make ImageLib share cached imgRequests for the same SVG document even if the URI has a different ref/hash","creation_time":"2014-06-18T15:22:41Z","last_change_time":"2023-12-04T11:49:57Z","status":"NEW","id":1027106},{"id":1037984,"status":"NEW","last_change_time":"2024-06-04T18:21:25Z","creation_time":"2014-07-13T16:33:17Z","summary":"Website causes Firefox to completely hang because same script file is getting loaded over and over again","op_sys":"All","priority":"P2","component":"New Tab Page","keywords":["csectype-dos","hang","memory-leak","perf:responsiveness","reproducible","testcase"],"severity":"S3"},{"severity":"S4","keywords":["perf:resource-use"],"priority":"P5","component":"DOM: Core & HTML","last_change_time":"2022-03-02T15:47:27Z","status":"NEW","id":1107626,"summary":"Evaluate aggregating timers to reduce the number of times we wake up the CPU for serving them","op_sys":"All","creation_time":"2014-12-04T20:16:51Z"},{"op_sys":"All","summary":"Thumbnail generation should have a time limit","creation_time":"2015-05-07T20:09:26Z","last_change_time":"2023-07-24T12:16:09Z","status":"NEW","id":1162698,"severity":"--","keywords":["memory-footprint","memory-leak","perf","perf:responsiveness","top-memory-leak"],"priority":"P3","component":"New Tab Page"},{"priority":"--","component":"Session Restore","keywords":["meta","perf:animation","perf:resource-use","perf:responsiveness","reproducible"],"severity":"S3","creation_time":"2016-09-21T13:54:15Z","summary":"Session Restore generates sustained large disk traffic [meta]","op_sys":"All","id":1304389,"status":"NEW","last_change_time":"2024-09-03T17:02:27Z"},{"priority":"P3","component":"Layout","severity":"S3","keywords":["perf","perf:pageload"],"id":1348469,"status":"NEW","last_change_time":"2022-10-11T19:06:39Z","creation_time":"2017-03-18T03:14:39Z","op_sys":"Unspecified","summary":"Consider using FramePropertyTable less in layout"},{"creation_time":"2017-03-23T02:16:50Z","summary":"getElevationRequired janks the parent process by doing IO on the main thread","op_sys":"macOS","id":1349809,"status":"NEW","last_change_time":"2022-10-11T19:07:40Z","priority":"P3","component":"Application Update","severity":"S3","keywords":["perf","perf:responsiveness"]},{"last_change_time":"2022-10-11T19:12:45Z","status":"NEW","id":1357205,"op_sys":"Unspecified","summary":"move built-in add-ons into omni.ja","creation_time":"2017-04-17T21:50:27Z","severity":"S3","keywords":["perf:startup"],"priority":"P3","component":"Add-ons Manager"},{"severity":"S3","keywords":["perf:responsiveness"],"component":"Bookmarks & History","priority":"P3","op_sys":"Unspecified","summary":"Showing the bookmarks panel is too slow the first time","creation_time":"2017-05-08T18:35:31Z","last_change_time":"2024-04-03T13:53:20Z","id":1363131,"status":"NEW"},{"component":"XPCOM","priority":"--","keywords":["meta","perf","perf:responsiveness","perf:startup"],"severity":"S3","id":1363586,"status":"NEW","last_change_time":"2022-10-11T19:16:59Z","creation_time":"2017-05-10T02:24:10Z","op_sys":"Unspecified","summary":"[meta] Creating the XPCOM system info service is super expensive"},{"status":"NEW","id":1364091,"last_change_time":"2022-10-11T19:17:24Z","creation_time":"2017-05-11T14:44:03Z","op_sys":"Unspecified","summary":"Defer mozilla::widget::AudioSession::Start() until later in startup","priority":"P3","component":"Widget: Win32","severity":"S3","keywords":["perf","perf:responsiveness","perf:startup"]},{"op_sys":"Unspecified","summary":"NSS should be initialized off main thread","creation_time":"2017-06-06T12:51:51Z","last_change_time":"2023-12-11T13:17:23Z","id":1370516,"status":"NEW","keywords":["perf:responsiveness","perf:startup"],"severity":"S3","component":"Security: PSM","priority":"P2"},{"status":"NEW","id":1374216,"last_change_time":"2022-10-11T19:24:38Z","creation_time":"2017-06-19T08:52:46Z","summary":"Add-on icons should be in the navbar by first paint","op_sys":"Unspecified","component":"Toolbars and Customization","priority":"P3","severity":"S3","keywords":["perf:frontend","perf:startup","regression","regressionwindow-wanted"]},{"id":1388538,"status":"NEW","last_change_time":"2024-12-06T16:27:49Z","creation_time":"2017-08-08T21:56:17Z","summary":"Add ICs for slotful own-prop Xray property access (property on the expando)","op_sys":"Unspecified","component":"JavaScript Engine","priority":"P3","keywords":[],"severity":"S3"},{"status":"NEW","id":1393977,"last_change_time":"2022-10-11T19:37:50Z","creation_time":"2017-08-25T20:33:04Z","summary":"Compiling the same script again and again for each embedded YouTube video","op_sys":"All","component":"JavaScript Engine","priority":"P3","keywords":["perf"],"severity":"S3"},{"summary":"Using software video decoders (include VP9) ramps up computer fans on Macbook.","op_sys":"macOS","creation_time":"2017-09-18T08:13:45Z","last_change_time":"2022-10-11T19:42:53Z","id":1400787,"status":"NEW","keywords":["perf:resource-use"],"severity":"S3","priority":"P3","component":"Audio/Video: Playback"},{"component":"XPCOM","priority":"P3","keywords":["perf","perf:responsiveness"],"severity":"S3","creation_time":"2017-09-25T16:43:13Z","op_sys":"All","summary":"drag gecko hashtables into the current century","id":1402910,"status":"NEW","last_change_time":"2022-10-11T19:44:41Z"},{"priority":"P2","component":"CSS Parsing and Computation","severity":"S3","keywords":["perf:responsiveness"],"creation_time":"2017-10-07T10:11:51Z","op_sys":"Unspecified","summary":"stylo: use invalidation framework to handle restyles needed in response to content insertion/removal","id":1406622,"status":"NEW","last_change_time":"2022-10-11T19:47:36Z"},{"summary":"With tab animations disabled, closing current tab to switch to another will visibly show a blank page with spinner (causing flashing)","op_sys":"All","creation_time":"2017-12-18T17:47:35Z","last_change_time":"2023-03-15T20:38:46Z","status":"NEW","id":1425887,"keywords":["perf","perf:frontend"],"severity":"S3","component":"Tabbed Browser","priority":"P3"},{"summary":"RexBench is slower than Chrome/WebKit","op_sys":"Unspecified","creation_time":"2018-01-09T05:47:13Z","last_change_time":"2022-10-11T21:09:38Z","status":"NEW","id":1428972,"keywords":["perf"],"severity":"S3","component":"JavaScript Engine","priority":"P2"},{"component":"New Tab Page","priority":"P3","severity":"S3","keywords":["perf:frontend","perf:startup"],"id":1439892,"status":"NEW","last_change_time":"2024-04-03T03:06:41Z","creation_time":"2018-02-21T13:15:04Z","summary":"Activity stream initialization causes jank after receiving the sessionstore-windows-restored notification","op_sys":"Unspecified"},{"creation_time":"2018-03-05T04:29:30Z","summary":"Try to understand why we're slower than Chrome on StyleBench \"Positional pseudo classes : Adding leaf elements: Async\" (& similar \"Removing\" measurement)","op_sys":"Unspecified","id":1443066,"status":"NEW","last_change_time":"2022-10-11T21:21:11Z","component":"CSS Parsing and Computation","priority":"P3","keywords":["perf","perf:responsiveness"],"severity":"S3"},{"priority":"P3","component":"Application Update","severity":"S3","keywords":["perf:startup"],"status":"NEW","id":1446012,"last_change_time":"2022-10-11T21:23:37Z","creation_time":"2018-03-15T16:29:05Z","summary":"The first startup after an update does main thread I/O to update.status several times","op_sys":"Unspecified"},{"last_change_time":"2022-10-11T21:30:16Z","status":"NEW","id":1454586,"summary":"Optimize resume point creation in IonBuilder","op_sys":"All","creation_time":"2018-04-17T08:42:34Z","keywords":["perf"],"severity":"S3","priority":"P3","component":"JavaScript Engine: JIT"},{"severity":"S3","keywords":["perf","perf:responsiveness","perf:startup"],"component":"Networking: JAR","priority":"P3","op_sys":"Unspecified","summary":"nsJARChannel::asyncOpen can still block","creation_time":"2018-04-24T20:33:58Z","last_change_time":"2022-10-11T21:31:53Z","id":1456626,"status":"NEW"},{"keywords":["nightly-community","perf","perf:responsiveness","regression"],"severity":"S3","component":"Web Painting","priority":"P3","last_change_time":"2024-09-22T12:19:05Z","status":"NEW","id":1456638,"op_sys":"Windows 7","summary":"Checkerboarding while scrollbar-dragging due to slow display list build on specific page with table layout","creation_time":"2018-04-24T21:08:43Z"},{"severity":"S3","keywords":["perf","perf:responsiveness"],"component":"Layout: Block and Inline","priority":"P3","summary":"It takes a long time to re-layout the plaintext page when the sidebar is opening or closing until  move the mouse in the content area (with long time spent in RFindLineContaining)","op_sys":"Windows 10","creation_time":"2018-04-25T19:10:14Z","last_change_time":"2024-02-08T23:49:09Z","id":1456964,"status":"NEW"},{"creation_time":"2018-04-26T19:55:49Z","op_sys":"Unspecified","summary":"TabChild::RecvRenderLayers often results in two consecutive paints","id":1457276,"status":"NEW","last_change_time":"2023-09-21T15:50:42Z","component":"DOM: Content Processes","priority":"P2","keywords":["perf:resource-use"],"severity":"S3"},{"severity":"S3","keywords":["perf","perf:resource-use","perf:responsiveness"],"priority":"P3","component":"Bookmarks & History","summary":"\"forget about this site\" in \"show all history\" blocks the main thread","op_sys":"Unspecified","creation_time":"2018-05-02T18:01:37Z","last_change_time":"2023-05-22T15:45:39Z","id":1458634,"status":"NEW"},{"op_sys":"Unspecified","summary":"High variability in performance testing with large images","creation_time":"2018-06-11T20:32:18Z","last_change_time":"2022-10-11T21:41:13Z","id":1468246,"status":"NEW","severity":"S3","keywords":["perf:pageload"],"priority":"P3","component":"Layout"},{"status":"NEW","id":1471029,"last_change_time":"2022-10-11T21:43:40Z","creation_time":"2018-06-25T21:14:25Z","op_sys":"All","summary":"High cpu/gpu usage and hangs on page-http://telegra.ph/Telegram-X-03-26 & other pages","component":"Audio/Video: Playback","priority":"P3","keywords":["hang","perf:resource-use","power"],"severity":"S3"},{"severity":"S3","keywords":["perf:responsiveness","perf:startup"],"component":"Security: Process Sandboxing","priority":"P2","summary":"Optimize Windows sandbox policy construction","op_sys":"Windows","creation_time":"2018-07-16T20:44:07Z","last_change_time":"2022-10-11T21:47:20Z","id":1476101,"status":"NEW"},{"component":"CSS Parsing and Computation","priority":"P3","severity":"S3","keywords":["perf:responsiveness"],"id":1478953,"status":"NEW","last_change_time":"2022-10-11T21:49:50Z","creation_time":"2018-07-27T10:44:44Z","op_sys":"Unspecified","summary":"style.foo = bar changes are slow"},{"creation_time":"2018-08-02T16:18:10Z","summary":"Removing DOM children where positional pseudo-classes are involved is really slow.","op_sys":"Unspecified","status":"NEW","id":1480477,"last_change_time":"2024-09-03T16:59:49Z","component":"CSS Parsing and Computation","priority":"P2","severity":"S3","keywords":["perf:responsiveness"]},{"keywords":["perf:resource-use"],"severity":"S3","priority":"P2","component":"Audio/Video: Playback","summary":"100% cpu usage and high memory use on page with multiple embedded videos","op_sys":"All","creation_time":"2018-08-08T22:40:31Z","last_change_time":"2022-10-11T21:52:11Z","status":"NEW","id":1481967},{"priority":"P3","component":"JavaScript Engine: JIT","keywords":[],"severity":"S3","creation_time":"2018-08-14T19:58:58Z","op_sys":"Unspecified","summary":"Try and re-attach NewObject stubs after GC","id":1483345,"status":"NEW","last_change_time":"2024-09-21T13:28:21Z"},{"summary":"Significant key input delay when typing on large Google Docs","op_sys":"macOS","creation_time":"2018-09-04T14:10:08Z","last_change_time":"2024-07-16T07:42:18Z","id":1488435,"status":"NEW","keywords":[],"severity":"S3","priority":"P3","component":"JavaScript Engine"},{"last_change_time":"2023-07-18T21:09:40Z","id":1490847,"status":"NEW","summary":"[meta] Long-standing Ion Compilation Time Issues","op_sys":"Unspecified","creation_time":"2018-09-12T22:40:00Z","keywords":["meta"],"severity":"S3","priority":"P2","component":"JavaScript Engine: JIT"},{"keywords":[],"severity":"S3","priority":"P2","component":"JavaScript Engine: JIT","last_change_time":"2024-12-17T17:27:39Z","status":"NEW","id":1490849,"summary":"Off-Main-Thread Baseline Compilation","op_sys":"Unspecified","creation_time":"2018-09-12T22:46:57Z"},{"priority":"P2","component":"Audio/Video: Playback","keywords":["perf:resource-use"],"severity":"S3","creation_time":"2018-10-03T15:02:45Z","op_sys":"Unspecified","summary":"Horrible performance on runningworld due to media decoding","status":"NEW","id":1496096,"last_change_time":"2022-10-11T22:03:30Z"},{"priority":"P3","component":"JavaScript Engine","keywords":["perf:responsiveness"],"severity":"S3","id":1498485,"status":"NEW","last_change_time":"2024-05-03T15:18:39Z","creation_time":"2018-10-12T07:38:21Z","op_sys":"Android","summary":"hubs.mozilla.com frame rate with an empty scene is too slow in FxR on Oculus Go"},{"severity":"S3","keywords":["perf:animation","regression","reproducible","top50"],"component":"CSS Parsing and Computation","priority":"--","last_change_time":"2024-09-22T12:17:26Z","status":"NEW","id":1502334,"summary":"Reddit content is no longer displayed when scrolled (checkerboarding), with long restyles","op_sys":"All","creation_time":"2018-10-26T12:54:03Z"},{"last_change_time":"2022-10-11T22:10:59Z","id":1505192,"status":"NEW","summary":"twitch.tv site loads slow compared to Chrome","op_sys":"Android","creation_time":"2018-11-06T22:12:10Z","keywords":["perf:pageload"],"severity":"S3","component":"JavaScript Engine","priority":"P2"},{"priority":"P2","component":"Audio/Video","severity":"S3","keywords":["perf:responsiveness"],"id":1505483,"status":"NEW","last_change_time":"2022-10-11T22:11:18Z","creation_time":"2018-11-07T17:49:31Z","op_sys":"Unspecified","summary":"Getting a list of audio devices on about:support is super slow sometimes"},{"severity":"S3","keywords":["main-thread-io","perf:responsiveness"],"component":"Graphics","priority":"P5","summary":"graphics data gathering (and/or canvas webgl context initialization) from about:support is slow","op_sys":"Unspecified","creation_time":"2018-11-07T19:32:59Z","last_change_time":"2024-03-20T20:46:07Z","status":"NEW","id":1505533},{"severity":"S3","keywords":["perf:responsiveness"],"component":"DOM: Animation","priority":"P3","op_sys":"Unspecified","summary":"Do an optimization to not flush animations which are running on the compositor in various places where we call FlushPendingNotification","creation_time":"2018-11-13T04:54:48Z","last_change_time":"2022-10-11T22:12:27Z","status":"NEW","id":1506765},{"severity":"S3","keywords":["perf:frontend","perf:responsiveness","perf:startup"],"priority":"P5","component":"Tabbed Browser","last_change_time":"2022-10-11T22:12:38Z","id":1506962,"status":"NEW","op_sys":"Unspecified","summary":"Try persisting chromemargin and brighttext attributes on browser windows","creation_time":"2018-11-13T21:07:29Z"},{"severity":"S3","keywords":["parity-chrome","perf","perf:animation","perf:pageload","perf:responsiveness","regression","reproducible"],"priority":"P3","component":"PDF Viewer","last_change_time":"2023-07-24T12:22:05Z","id":1508765,"status":"NEW","summary":"Firefox is very slow to render poster PDF","op_sys":"Unspecified","creation_time":"2018-11-20T19:36:06Z"},{"component":"DOM: Core & HTML","priority":"P3","keywords":["perf","perf:pageload"],"severity":"S3","id":1509228,"status":"NEW","last_change_time":"2022-10-11T22:14:24Z","creation_time":"2018-11-22T04:38:51Z","op_sys":"Unspecified","summary":"Optimizing nsGlobalWindowOuter::NotifyContentBlockingState() seems to have an impact on pageload"},{"creation_time":"2018-12-19T19:35:51Z","summary":"Defer GCs in background tabs/processes during pageload","op_sys":"Unspecified","status":"NEW","id":1515414,"last_change_time":"2022-10-11T22:19:55Z","priority":"P3","component":"JavaScript: GC","keywords":["perf","perf:pageload"],"severity":"S3"},{"op_sys":"Unspecified","summary":"CPU intensive slideshow on http://thesantaclausparade.com/","creation_time":"2018-12-19T22:43:20Z","last_change_time":"2024-08-03T20:54:28Z","id":1515473,"status":"NEW","keywords":["perf","perf:responsiveness"],"severity":"S3","component":"Graphics","priority":"P3"},{"last_change_time":"2023-08-05T01:39:19Z","id":1515799,"status":"NEW","op_sys":"Unspecified","summary":"[meta] reduce impact/overhead of custom element use on startup","creation_time":"2018-12-20T23:13:35Z","severity":"S3","keywords":["meta","perf:frontend","perf:startup"],"priority":"P3","component":"General"},{"last_change_time":"2022-10-11T22:20:48Z","id":1516525,"status":"NEW","summary":"Download indicator code should use idle task and/or not load until there are downloads","op_sys":"Unspecified","creation_time":"2018-12-27T14:05:19Z","severity":"S3","keywords":["perf:frontend","perf:startup"],"priority":"P5","component":"Downloads Panel"},{"severity":"S3","keywords":["perf:responsiveness"],"priority":"P2","component":"CSS Parsing and Computation","summary":"Slow load and long delay before search field can be interacted with on https://scouts.org.uk","op_sys":"Unspecified","creation_time":"2019-01-02T14:52:14Z","last_change_time":"2022-10-11T22:21:13Z","status":"NEW","id":1517254},{"severity":"S3","keywords":["perf:responsiveness"],"component":"Layout","priority":"P2","last_change_time":"2022-10-11T22:24:11Z","status":"NEW","id":1520729,"summary":"jetbrains \"upsource\" file-view hangs the browser, when scrolled","op_sys":"Unspecified","creation_time":"2019-01-17T08:50:51Z"},{"component":"Layout: Text and Fonts","priority":"P2","severity":"S3","keywords":["perf:pageload"],"id":1522196,"status":"NEW","last_change_time":"2022-10-11T22:25:37Z","creation_time":"2019-01-23T18:40:07Z","op_sys":"All","summary":"InitOtherFamilyNamesRunnable can slow down first page load and take > 100ms"},{"priority":"P3","component":"Preferences","keywords":["meta","perf","perf:responsiveness","regression"],"severity":"S3","status":"NEW","id":1523028,"last_change_time":"2024-09-22T12:25:57Z","creation_time":"2019-01-26T00:23:18Z","summary":"[meta] Performance of \"about:config\"","op_sys":"All"},{"keywords":["perf:responsiveness"],"severity":"S3","priority":"P2","component":"Audio/Video: Playback","summary":"Twitch.tv video's (vod) freeze during playback on MacOS","op_sys":"macOS","creation_time":"2019-01-31T20:58:54Z","last_change_time":"2023-05-03T01:27:00Z","id":1524384,"status":"NEW"},{"keywords":["perf:responsiveness"],"severity":"S3","priority":"P2","component":"Web Painting","last_change_time":"2022-10-11T22:29:04Z","id":1527037,"status":"NEW","op_sys":"Unspecified","summary":"Scroll jank when mousewheel-scrolling slide thumbnails on Google Docs (with lots of time spent painting & in GetFrameForPoint)","creation_time":"2019-02-11T18:16:31Z"},{"priority":"P2","component":"Networking: HTTP","keywords":["meta","perf:pageload"],"severity":"S3","id":1528285,"status":"NEW","last_change_time":"2023-06-30T18:02:44Z","creation_time":"2019-02-15T16:08:16Z","summary":"[meta] Allow call of AsyncOpen and OnStart/OnStopRequest off the main thread","op_sys":"Unspecified"},{"priority":"P3","component":"Menus","keywords":["perf:frontend","perf:startup"],"severity":"S3","creation_time":"2019-03-11T18:25:07Z","op_sys":"Unspecified","summary":"Lazy load browser.xul menus","id":1534371,"status":"NEW","last_change_time":"2023-08-05T01:38:55Z"},{"priority":"P3","component":"Graphics","keywords":["perf","perf:resource-use"],"severity":"S3","creation_time":"2019-03-19T21:20:53Z","op_sys":"macOS","summary":"[10.14.4] Poor battery life on MacBook Pro","status":"NEW","id":1536622,"last_change_time":"2023-02-01T17:22:05Z"},{"last_change_time":"2024-04-02T13:41:19Z","status":"NEW","id":1536739,"op_sys":"Unspecified","summary":"Performance is slow/janky with a full complement of add-ons, restored session, opening discarded tabs","creation_time":"2019-03-20T07:53:47Z","severity":"S3","keywords":["perf:responsiveness"],"component":"General","priority":"P3"},{"id":1538784,"status":"NEW","last_change_time":"2022-10-11T22:39:08Z","creation_time":"2019-03-25T17:26:55Z","op_sys":"Unspecified","summary":"Set nsThreadPool limits more intelligently","component":"XPCOM","priority":"--","severity":"S3","keywords":["perf:resource-use"]},{"creation_time":"2019-03-26T20:57:57Z","op_sys":"Unspecified","summary":"Running gfxPlatform::Init in the content process can take a long time","id":1539266,"status":"NEW","last_change_time":"2022-10-11T22:39:22Z","priority":"P3","component":"Graphics","keywords":["perf:responsiveness"],"severity":"S3"},{"creation_time":"2019-03-29T19:18:26Z","op_sys":"Unspecified","summary":"Brief video and audio interruptions on YouTube when tab is focused after it was in the background","id":1540226,"status":"NEW","last_change_time":"2022-10-11T22:40:24Z","component":"Graphics","priority":"P2","keywords":["perf:responsiveness"],"severity":"S3"},{"keywords":["main-thread-io","perf:startup"],"severity":"S3","priority":"P2","component":"Crash Reporting","summary":"Avoid nsExceptionHandler::SetupExtraData() doing main thread IO super early on startup","op_sys":"Unspecified","creation_time":"2019-04-02T20:18:11Z","last_change_time":"2022-10-11T22:41:22Z","id":1541200,"status":"NEW"},{"status":"NEW","id":1541491,"last_change_time":"2024-07-25T20:36:55Z","creation_time":"2019-04-03T17:10:18Z","op_sys":"Unspecified","summary":"Evaluate whether we can stop using compatibility.ini in the common case where app compat info is in profiles.ini / installs.ini","priority":"P3","component":"Startup and Profile System","severity":"S3","keywords":["main-thread-io","perf","perf:startup"]},{"creation_time":"2019-04-03T17:15:49Z","summary":"Stop writing compatibility.ini piecemeal and on the main thread and on startup","op_sys":"Unspecified","status":"NEW","id":1541494,"last_change_time":"2022-10-11T22:41:40Z","component":"Startup and Profile System","priority":"P3","keywords":["main-thread-io","perf","perf:responsiveness","perf:startup"],"severity":"S3"},{"severity":"S3","keywords":["main-thread-io","perf","perf:startup"],"component":"Startup and Profile System","priority":"--","summary":"Very very very carefully... remove channel-prefs.js and stop reading it from the main thread early on startup","op_sys":"Unspecified","creation_time":"2019-04-03T21:31:57Z","last_change_time":"2024-01-29T10:01:40Z","status":"NEW","id":1541601},{"summary":"[meta] 5+ second delays seen while loading www.allrecipes.com on geckoview_example","op_sys":"Unspecified","creation_time":"2019-04-11T17:55:48Z","last_change_time":"2024-04-08T18:35:59Z","id":1543776,"status":"NEW","severity":"S3","keywords":["meta","perf:pageload"],"component":"Performance","priority":"P2"},{"priority":"--","component":"XPCOM","keywords":["main-thread-io","perf","perf:startup"],"severity":"S3","status":"NEW","id":1544019,"last_change_time":"2023-05-31T19:21:00Z","creation_time":"2019-04-12T14:40:08Z","summary":"Consolidate IO for startupCache folder access","op_sys":"Unspecified"},{"priority":"P3","component":"Startup and Profile System","keywords":["main-thread-io","perf","perf:responsiveness","perf:startup"],"severity":"S3","creation_time":"2019-04-15T18:19:33Z","op_sys":"Unspecified","summary":"Investigate compressing omni.ja's (with lz4)","id":1544504,"status":"NEW","last_change_time":"2022-10-11T22:44:28Z"},{"component":"Application Update","priority":"P5","severity":"S3","keywords":["main-thread-io","perf:startup"],"id":1545119,"status":"NEW","last_change_time":"2023-06-26T23:49:36Z","creation_time":"2019-04-17T15:06:25Z","summary":"Update service tries to migrate things from \"old update dir\" early on startup and does main thread IO","op_sys":"Unspecified"},{"component":"Startup and Profile System","priority":"P3","keywords":["main-thread-io","perf","perf:startup"],"severity":"S3","creation_time":"2019-04-30T16:38:33Z","op_sys":"Unspecified","summary":"Only prefetch the parts of XUL.dll  that we actually will need","id":1548033,"status":"NEW","last_change_time":"2022-10-11T22:47:35Z"},{"last_change_time":"2022-10-11T22:48:08Z","status":"NEW","id":1548539,"summary":"Stopping blocking bfcache on unconnected peerconnections","op_sys":"Unspecified","creation_time":"2019-05-02T14:17:10Z","severity":"S3","keywords":["perf:pageload"],"component":"WebRTC","priority":"P2"},{"creation_time":"2019-05-22T16:11:19Z","op_sys":"Unspecified","summary":"Use minidump-analyzer to append Windows AV/spyware/firewall data to crashreport .extra file; add to telemetry environment data lazily","status":"NEW","id":1553536,"last_change_time":"2022-10-11T22:52:33Z","component":"Crash Reporting","priority":"--","keywords":["main-thread-io","perf","perf:startup"],"severity":"S3"},{"summary":"Defer initial processing by Privileged Content process at startup","op_sys":"Unspecified","creation_time":"2019-05-23T21:51:13Z","last_change_time":"2022-10-11T22:52:58Z","status":"NEW","id":1553980,"severity":"S3","keywords":["perf:resource-use"],"priority":"P3","component":"New Tab Page"},{"status":"NEW","id":1554200,"last_change_time":"2023-02-22T18:35:16Z","creation_time":"2019-05-24T15:01:19Z","summary":"nsLocalFile's Clone method is too naive, should reuse more information from the original","op_sys":"Unspecified","component":"XPCOM","priority":"--","keywords":["main-thread-io","perf:resource-use","perf:startup"],"severity":"S3"},{"keywords":["perf:pageload","perf:responsiveness"],"severity":"S3","component":"Safe Browsing","priority":"P3","last_change_time":"2022-10-11T22:53:15Z","status":"NEW","id":1554313,"op_sys":"Unspecified","summary":"Classifier Update should wait for an user-idle period before initiating an update","creation_time":"2019-05-24T20:22:15Z"},{"summary":"StartupCache takes a very long time to write out cache after browser startup","op_sys":"Unspecified","creation_time":"2019-05-25T14:59:39Z","last_change_time":"2024-09-17T05:36:02Z","status":"NEW","id":1554395,"keywords":["perf:pageload"],"severity":"S3","component":"XPCOM","priority":"--"},{"severity":"S3","keywords":["main-thread-io","perf","perf:startup"],"priority":"P3","component":"Security: PSM","op_sys":"Unspecified","summary":"Investigate linking softokn/freebl/nss thingies directly into libxul or use readahead to make actual nss initialization cheaper","creation_time":"2019-06-06T15:49:16Z","last_change_time":"2023-12-11T13:15:54Z","status":"NEW","id":1557378},{"keywords":["perf:resource-use","perf:startup"],"severity":"S3","component":"General","priority":"P3","op_sys":"All","summary":"When defaulting to showing about:home on startup, try to delay WebExtension process start-up until after about:home is done loading","creation_time":"2019-07-16T15:55:54Z","last_change_time":"2024-04-03T16:04:02Z","id":1566487,"status":"NEW"},{"last_change_time":"2024-09-20T22:54:50Z","status":"NEW","id":1568027,"summary":"WebRender performs worse on Binding of Isaac CodePen demo (svg filters/blob)","op_sys":"Unspecified","creation_time":"2019-07-22T20:30:43Z","severity":"S3","keywords":["perf:responsiveness"],"priority":"P3","component":"Graphics: WebRender"},{"op_sys":"Unspecified","summary":"Investigate fast first paints","creation_time":"2019-07-30T18:44:15Z","last_change_time":"2022-10-11T23:08:22Z","status":"NEW","id":1570090,"severity":"S3","keywords":["perf:pageload"],"component":"Performance","priority":"P2"},{"status":"NEW","id":1570616,"last_change_time":"2024-04-30T00:02:56Z","creation_time":"2019-08-01T11:28:18Z","summary":"[meta] Move away from sync CoCreateInstance to RoGetAgileReference or similar (to avoid mainthread IO)","op_sys":"Windows","priority":"P3","component":"Widget: Win32","severity":"S3","keywords":["main-thread-io","meta","perf:responsiveness","perf:startup"]},{"last_change_time":"2024-04-08T18:30:47Z","id":1570750,"status":"NEW","summary":"gfxFontGroup::FindFontForChar took a lot of time during reflow","op_sys":"Unspecified","creation_time":"2019-08-01T19:38:04Z","severity":"S3","keywords":["perf:pageload"],"component":"Layout: Text and Fonts","priority":"P3"},{"op_sys":"Unspecified","summary":"68 runs 3x slower than 67 on sample script","creation_time":"2019-08-07T18:46:11Z","last_change_time":"2022-10-11T23:10:26Z","id":1572180,"status":"NEW","keywords":["perf:resource-use"],"severity":"S3","component":"Performance","priority":"P2"},{"status":"NEW","id":1582525,"last_change_time":"2022-03-02T16:34:12Z","creation_time":"2019-09-19T18:12:52Z","summary":"Avoid racing 6 connections for sites known to have been HTTP2 in the past","op_sys":"Unspecified","priority":"P5","component":"Networking","keywords":["perf:pageload"],"severity":"N/A"},{"severity":"S3","keywords":["perf:pageload","perf:responsiveness","reproducible","top50"],"component":"Performance","priority":"P2","last_change_time":"2024-04-08T18:37:25Z","status":"NEW","id":1583220,"op_sys":"Android","summary":"Visual metrics: Fenix is significantly slower than Chrome for the site https://cnn.com","creation_time":"2019-09-23T14:36:55Z"},{"creation_time":"2019-10-01T13:25:15Z","summary":"Add normal-priority event queue delay time to Responsiveness measurements","op_sys":"Unspecified","status":"NEW","id":1585327,"last_change_time":"2022-10-11T23:23:49Z","priority":"P2","component":"Performance","severity":"S3","keywords":["perf:responsiveness"]},{"keywords":["perf:frontend"],"severity":"S3","component":"Bookmarks & History","priority":"P3","last_change_time":"2023-08-05T01:41:54Z","status":"NEW","id":1597684,"summary":"Bookmarks & History: extremely slow back/forward navigation","op_sys":"Unspecified","creation_time":"2019-11-19T14:50:13Z"},{"summary":"13 seconds of jank when loading https://data.firefox.com/dashboard/hardware","op_sys":"Unspecified","creation_time":"2019-11-21T18:08:03Z","last_change_time":"2024-09-04T03:21:05Z","id":1598384,"status":"NEW","severity":"S3","keywords":["perf:pageload"],"component":"JavaScript Engine","priority":"P3"},{"priority":"P3","component":"DOM: 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GeckoView","op_sys":"All","creation_time":"2020-01-16T14:10:52Z","last_change_time":"2024-05-02T17:15:10Z","status":"NEW","id":1609682,"keywords":["perf:pageload"],"severity":"S3","component":"General","priority":"P3"},{"last_change_time":"2024-06-28T12:13:45Z","id":1613760,"status":"NEW","summary":"[fission-power] Synchronize periodic background tasks (such as expiration tracker ticks) across content processes","op_sys":"All","creation_time":"2020-02-06T20:58:06Z","keywords":["perf:resource-use"],"severity":"S3","component":"Performance","priority":"P2"},{"severity":"S3","keywords":["perf:pageload"],"priority":"P2","component":"Performance","summary":"Apple Newsroom page takes a long time to load (30 seconds)","op_sys":"Android","creation_time":"2020-02-07T04:18:58Z","last_change_time":"2024-04-08T18:38:02Z","id":1613824,"status":"NEW"},{"component":"General","priority":"--","severity":"S3","keywords":["meta","perf:responsiveness","sec-want"],"creation_time":"2020-02-08T01:20:13Z","op_sys":"All","summary":"[meta] Move all devtools UI out of the parent process into a privileged content process","status":"NEW","id":1614096,"last_change_time":"2024-09-02T15:26:30Z"},{"last_change_time":"2024-04-08T18:38:17Z","status":"NEW","id":1614425,"op_sys":"Android","summary":"https://www.fido.ca/ Pages load on mobile is several seconds slower than chrome","creation_time":"2020-02-10T18:50:35Z","keywords":["perf:pageload"],"severity":"S3","priority":"P2","component":"Performance"},{"severity":"S3","keywords":["perf:frontend","perf:startup"],"component":"General","priority":"--","last_change_time":"2022-10-12T00:00:07Z","id":1618129,"status":"NEW","op_sys":"Linux","summary":"Very slow session restore (profile included)","creation_time":"2020-02-26T10:02:21Z"},{"id":1618391,"status":"NEW","last_change_time":"2024-04-08T18:26:05Z","creation_time":"2020-02-26T23:53:36Z","op_sys":"Android","summary":"Avoid parsing and compiling self-hosted code during startup (takes 90ms on Android Moto G5)","priority":"P2","component":"JavaScript Engine","keywords":["perf:responsiveness"],"severity":"S3"},{"severity":"--","keywords":["perf:responsiveness"],"component":"Performance","priority":"--","summary":"Slow performance when scrolling Firefox subreddit top posts of the week","op_sys":"Windows 10","creation_time":"2020-03-16T05:56:39Z","last_change_time":"2023-04-03T17:43:21Z","status":"NEW","id":1622721},{"component":"General","priority":"P3","severity":"S3","keywords":["meta","perf:responsiveness"],"status":"NEW","id":1623518,"last_change_time":"2024-09-17T05:44:07Z","creation_time":"2020-03-18T23:56:47Z","op_sys":"Android","summary":"[meta] Script cache information from the content process is never written to disk in GeckoView (10-20ms startup penalty for uncached script loading)"},{"severity":"S3","keywords":["main-thread-io","perf","perf:startup"],"component":"Graphics","priority":"P3","summary":"gfxDWriteFontEntry::IsCJKFont() causes main thread I/O to times.ttf while reflowing the hidden window during startup","op_sys":"Unspecified","creation_time":"2020-03-26T22:16:00Z","last_change_time":"2022-10-12T00:05:51Z","id":1625320,"status":"NEW"},{"keywords":["perf:responsiveness"],"severity":"--","priority":"P2","component":"Performance","last_change_time":"2022-04-07T16:16:58Z","status":"NEW","id":1626132,"summary":"Ghost-Windows from reddit","op_sys":"Unspecified","creation_time":"2020-03-31T00:27:33Z"},{"severity":"S3","keywords":["perf:responsiveness"],"priority":"P3","component":"Graphics: WebRender","op_sys":"All","summary":"WebRender program cache / shader initialization blocks the main thread via the sync IPC message PWebRenderBridge::EnsureConnected (25ms-40ms startup penalty)","creation_time":"2020-04-02T00:26:08Z","last_change_time":"2024-09-17T05:47:16Z","id":1626816,"status":"NEW"},{"severity":"S3","keywords":["perf:startup"],"component":"Privacy: Anti-Tracking","priority":"P3","last_change_time":"2022-04-01T11:20:52Z","id":1630939,"status":"NEW","summary":"URLDecorationAnnotationsService started very early during startup (profile-after-change)","op_sys":"Unspecified","creation_time":"2020-04-17T12:24:08Z"},{"last_change_time":"2022-03-28T19:20:38Z","id":1630949,"status":"NEW","summary":"UrlClassifierSkipListService started during startup for uninteresting http requests","op_sys":"Unspecified","creation_time":"2020-04-17T13:05:55Z","keywords":["perf:startup"],"severity":"S3","priority":"P3","component":"Privacy: Anti-Tracking"},{"component":"New Tab Page","priority":"P3","severity":"S4","keywords":["perf:frontend","perf:startup"],"creation_time":"2020-04-17T15:40:19Z","summary":"webRequest overhead for data: urls from about:newtab","op_sys":"Unspecified","id":1630999,"status":"NEW","last_change_time":"2022-03-08T18:34:18Z"},{"severity":"--","keywords":["perf:startup"],"component":"General","priority":"P3","op_sys":"Unspecified","summary":"Investigate merging small files loaded during startup into one file","creation_time":"2020-04-21T20:25:52Z","last_change_time":"2022-03-09T16:28:55Z","id":1631927,"status":"NEW"},{"summary":"Audit BrowserGlue.dispose for things that can likely be skipped at shutdown","op_sys":"All","creation_time":"2020-04-27T20:49:57Z","last_change_time":"2022-04-09T13:12:12Z","status":"NEW","id":1633566,"severity":"--","keywords":["perf","perf:responsiveness"],"component":"General","priority":"P3"},{"component":"Application Update","priority":"P3","keywords":["perf:startup"],"severity":"--","status":"NEW","id":1633921,"last_change_time":"2022-03-28T19:21:24Z","creation_time":"2020-04-28T22:29:02Z","summary":"600ms CreateFile on update.test on reference hardware during startup","op_sys":"Unspecified"},{"severity":"--","keywords":["perf:startup"],"priority":"--","component":"Startup and Profile System","op_sys":"Unspecified","summary":"Defer xulstore persistence until after startup","creation_time":"2020-04-28T23:08:28Z","last_change_time":"2022-03-09T16:30:24Z","status":"NEW","id":1633930},{"priority":"--","component":"Startup and Profile System","keywords":["perf:startup"],"severity":"--","id":1636996,"status":"NEW","last_change_time":"2022-03-28T19:21:51Z","creation_time":"2020-05-11T16:12:58Z","op_sys":"Unspecified","summary":"Defer UntrustedModuleProcessor work until later in startup"},{"severity":"S3","keywords":["perf:resource-use"],"priority":"P3","component":"DOM: Navigation","last_change_time":"2023-11-25T23:47:11Z","status":"NEW","id":1638119,"op_sys":"Unspecified","summary":"Allow extension processes to be preallocated","creation_time":"2020-05-14T20:22:45Z"},{"last_change_time":"2022-03-09T16:31:09Z","id":1638421,"status":"NEW","summary":"Defer mozilla::intl::GetSystemLocales() until later in startup","op_sys":"Unspecified","creation_time":"2020-05-15T18:19:13Z","keywords":["perf:startup"],"severity":"N/A","component":"Telemetry","priority":"P3"},{"severity":"S3","keywords":["perf:pageload"],"priority":"P3","component":"Networking","last_change_time":"2023-03-09T04:40:02Z","id":1641696,"status":"NEW","summary":"Firefox takes 50% more time than Microsoft Edge to display first paint of comments in reddit posts","op_sys":"Unspecified","creation_time":"2020-05-28T21:05:25Z"},{"keywords":["perf:resource-use","top50"],"severity":"N/A","priority":"--","component":"Graphics","summary":"Stop painting when the window is occluded on Windows","op_sys":"Unspecified","creation_time":"2020-06-10T13:56:24Z","last_change_time":"2024-07-23T03:28:07Z","status":"NEW","id":1644740},{"op_sys":"Windows","summary":"Background tabs stuck loading while CPU is under heavy load","creation_time":"2020-06-17T17:48:18Z","last_change_time":"2024-04-02T16:14:40Z","status":"NEW","id":1646449,"severity":"S3","keywords":["perf:responsiveness"],"component":"Performance","priority":"P2"},{"severity":"--","keywords":["perf:responsiveness"],"priority":"P2","component":"Performance","last_change_time":"2023-01-27T13:44:47Z","status":"NEW","id":1649890,"op_sys":"Unspecified","summary":"High CPU use on Techradar","creation_time":"2020-07-01T21:38:46Z"},{"priority":"--","component":"Session Restore","keywords":["perf:frontend","perf:responsiveness","perf:startup"],"severity":"--","creation_time":"2020-07-02T23:11:56Z","summary":"Slow startup/high CPU use when restoring Firefox session with about:newtab as active tab in all windows","op_sys":"Unspecified","status":"NEW","id":1650250,"last_change_time":"2022-04-01T11:13:08Z"},{"last_change_time":"2024-04-08T18:39:31Z","id":1650708,"status":"NEW","op_sys":"Unspecified","summary":"Firefox takes 50% more time than Chrome to load/reload pages on Boardgamegeek","creation_time":"2020-07-06T04:12:46Z","keywords":["perf:pageload"],"severity":"--","component":"Performance","priority":"P2"},{"severity":"N/A","keywords":["perf:frontend","perf:startup"],"priority":"P3","component":"General","summary":"Evaluate what things should move out of _scheduleArbitrarilyLateIdleTasks()","op_sys":"Unspecified","creation_time":"2020-07-07T18:32:36Z","last_change_time":"2022-03-28T19:22:23Z","status":"NEW","id":1651161},{"summary":"Performance issue on voice.google.com - Site can hang from seconds to minutes","op_sys":"Unspecified","creation_time":"2020-07-15T20:19:35Z","last_change_time":"2024-11-19T15:27:45Z","id":1653088,"status":"NEW","severity":"S4","keywords":["perf:responsiveness"],"priority":"P3","component":"JavaScript: GC"},{"op_sys":"All","summary":"WebGL aquarium sample runs at 30 FPS on Google Pixel 2, 60 FPS on WebView/Chromium","creation_time":"2020-07-18T16:39:27Z","last_change_time":"2022-03-02T16:39:35Z","id":1653777,"status":"NEW","keywords":["perf:responsiveness"],"severity":"S3","component":"Graphics: CanvasWebGL","priority":"P2"},{"severity":"S3","keywords":["leave-open","perf:responsiveness"],"component":"Debugger","priority":"P3","last_change_time":"2023-10-09T12:20:20Z","status":"NEW","id":1653779,"summary":"Firefox freezes and becomes unusable on react/typescript/eval-source-map project","op_sys":"Unspecified","creation_time":"2020-07-18T17:04:31Z"},{"status":"NEW","id":1656386,"last_change_time":"2024-04-08T18:39:46Z","creation_time":"2020-07-30T22:41:20Z","summary":"Slow loading of Medium article on Moto G (XT1031)","op_sys":"Android","component":"Performance","priority":"P3","keywords":["perf:pageload"],"severity":"S3"},{"creation_time":"2020-08-01T19:42:35Z","op_sys":"Unspecified","summary":"some games at gamee.com stutter a lot on firefox while it's smooth on chrome","id":1656709,"status":"NEW","last_change_time":"2022-03-02T16:39:47Z","priority":"P3","component":"Graphics: Canvas2D","keywords":["perf:responsiveness"],"severity":"S3"},{"keywords":["perf:responsiveness"],"severity":"S3","priority":"P3","component":"Graphics","summary":"Janking/stuttering while scrolling on imgur (Celeron N4000) (Geminilake)","op_sys":"Unspecified","creation_time":"2020-08-04T18:08:02Z","last_change_time":"2024-07-22T13:08:08Z","status":"NEW","id":1657183},{"keywords":["perf:pageload","regression","regressionwindow-wanted","reproducible","top50"],"severity":"S3","component":"Layout: Columns","priority":"--","last_change_time":"2023-08-14T15:04:45Z","id":1659166,"status":"NEW","summary":"Very long reflows on Wikipedia Barack Obama page","op_sys":"Unspecified","creation_time":"2020-08-14T18:12:37Z"},{"severity":"--","keywords":["perf:responsiveness"],"component":"Performance","priority":"P2","summary":"Heavy janking while doing page up/down on while loading a few tabs in the background","op_sys":"Unspecified","creation_time":"2020-08-16T19:42:09Z","last_change_time":"2022-04-07T16:20:18Z","id":1659359,"status":"NEW"},{"summary":"LinkedIn - high resource use (aka fans go crazy) on MacOS","op_sys":"macOS","creation_time":"2020-08-24T17:30:02Z","last_change_time":"2022-04-07T16:20:29Z","status":"NEW","id":1660838,"keywords":["perf:responsiveness"],"severity":"--","priority":"P2","component":"Performance"},{"id":1661090,"status":"NEW","last_change_time":"2022-03-02T16:40:07Z","creation_time":"2020-08-25T17:52:00Z","op_sys":"Windows 10","summary":"browser and content hangs when zooming map at https://mrosd.maps.arcgis.com/apps/webappviewer/index.html","component":"Graphics","priority":"--","severity":"S3","keywords":["perf:responsiveness"]},{"component":"Performance","priority":"P3","severity":"S3","keywords":["perf:pageload","reproducible"],"creation_time":"2020-09-08T20:28:35Z","summary":"9to5google article takes 2x as much time to load as 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unloading","op_sys":"Linux","creation_time":"2023-04-30T02:13:08Z","last_change_time":"2023-05-08T22:43:51Z","status":"UNCONFIRMED","id":1830648},{"priority":"--","component":"Audio/Video","keywords":["perf:resource-use","top50"],"severity":"--","id":1838205,"status":"UNCONFIRMED","last_change_time":"2024-06-28T12:09:32Z","creation_time":"2023-06-13T12:38:04Z","summary":"Firefox Performance issue","op_sys":"Unspecified"},{"creation_time":"2023-06-27T21:55:16Z","summary":"Ensure Cache API profiler markers allow investigation of problems like: DomCache(?) slowing Youtube loading/browsing","op_sys":"Unspecified","id":1840725,"status":"UNCONFIRMED","last_change_time":"2024-11-25T20:29:54Z","component":"Storage: Cache API","priority":"P3","severity":"S3","keywords":[]},{"keywords":["perf:animation","perf:responsiveness","top50"],"severity":"--","priority":"--","component":"Performance","op_sys":"Unspecified","summary":"'tup' cookie causes laggy/janky Google Maps performance when dragging","creation_time":"2023-07-04T14:45:31Z","last_change_time":"2024-01-08T23:18:09Z","id":1841643,"status":"UNCONFIRMED"},{"creation_time":"2023-08-08T21:57:22Z","summary":"memory","op_sys":"Unspecified","id":1847838,"status":"UNCONFIRMED","last_change_time":"2023-09-07T16:42:18Z","component":"Performance","priority":"--","keywords":["perf:resource-use","perf:responsiveness"],"severity":"--"},{"priority":"P5","component":"Performance","keywords":["perf:pageload","perf:responsiveness","perf:startup"],"severity":"S4","id":1870405,"status":"UNCONFIRMED","last_change_time":"2024-11-08T16:09:07Z","creation_time":"2023-12-15T22:43:19Z","summary":"Very slow time to first page load when opening Fenix with hundreds of tabs","op_sys":"Android"},{"creation_time":"2024-02-20T23:03:34Z","op_sys":"Unspecified","summary":"Ram memory leak","status":"UNCONFIRMED","id":1881147,"last_change_time":"2024-10-08T17:34:51Z","component":"Performance","priority":"--","severity":"--","keywords":["perf:resource-use"]},{"severity":"--","keywords":[],"component":"Performance","priority":"--","last_change_time":"2024-10-08T17:35:21Z","status":"UNCONFIRMED","id":1891411,"summary":"Very high memory usage(95%) by a single website","op_sys":"Unspecified","creation_time":"2024-04-15T04:46:16Z"},{"creation_time":"2024-10-03T13:51:14Z","summary":"Firefox takes 100% of one CPU core for each facebook tab opened","op_sys":"Unspecified","status":"UNCONFIRMED","id":1922534,"last_change_time":"2024-12-26T12:57:13Z","priority":"--","component":"Performance","keywords":[],"severity":"--"}]}