Bookmarklets are simple shortcuts that you can add to your browser’s bookmarks bar. Bookmarklets are small snippets of code which perform a specific action or function. Usually they help in providing quick access to actions that you regularly perform. Bookmarklets are usually written in Javascript and are super easy to add/remove.
So here are some helpful bookmarklets that come handy while using SharePoint. I have written them for SharePoint Online however these should work for SP2010/2013/2016 as well.
- Site permissions - link