Firefox CSS theme to maximize the vertical space of your monitor.

(Background: Tempano Port by Duwon Lee)

Contents

• Contents
• Compatibilty
• Features
• Suggested Tweaks
• Toggle PDF reader dark mode
• Install
• Credits

Compatibilty

Supported:

• Gnome, KDE, Hyprland, i3wm
• Windows 10, Windows 11

Not supported:

• Windows 8.1 Problem: Missing Toolbar Icons
• MacOS Catalina 10.15.5 and Big Sur 11.6 Problem: No toolbar!

Features

• Horizontal tabs are removed. Use Sidebery or Tree Style Tab

• Dark mode for the default PDF reader:
  

• Dark mode for hover URL menu:
  

• Thinner scroll bars:
  

Suggested Tweaks

Enable Compact Mode
about:config > browser.compactmode.show > True

Startup Image
about:config > browser.startup.preXulSkeletonUI > False

Save Startup Tabs
Settings > General > Startup > Open previous windows and tabs > True (Otherwise size of the top sites will change everytime you open the browser.)

Prevent Pinned Tabs From Loading browser.sessionstore.restore_pinned_tabs_on_demand > True

Toggle PDF reader dark mode

The PDF viewer dark mode is active by default. To deactivate it, just add ?n to the end of your pdf URL.

Install

• Follow the steps below to open the necessary directory:
  • Application Menu > Help > More troubleshooting information > Profile Folder > Open Folder
• Create a new folder and name it chrome
• Copy all of the files into the chrome folder
• Enable user scripts and compact mode:
  • Go to the about:config URL
  • Set toolkit.legacyUserProfileCustomizations.stylesheets to true
  • Set browser.compactmode.show to true
  • Right click Toolbar > Customize Toolbar > Density (Bottom Left) > Compact
• Install vertical tab extension: Sidebery or Tree Style Tab
• Reopen Firefox
• Customize the Sidebery/TreeStyleTabs and Toolbar to your hearts content.

Credits

• r/FirefoxCSS