The overhaul transforms the sidebar from a simple list of bookmarks into a multi-functional command center:
Based on the keyword firefox sidebar.revamp , you are referring to the major visual and functional overhaul of the Firefox Sidebar, which began rolling out in and was prominently feature-flagged as sidebar.revamp in about:config . firefox sidebar.revamp
If the options are missing or you want to force the classic look, you can use the internal configuration editor: Type about:config in the address bar and press Enter. Search for . The overhaul transforms the sidebar from a simple