Slim vertical button to toggle Firefox's (57+) sidebar on/off, on the left of browser. Firefox has native sidebar but no native switch to be touched on the edge of browser. This userChrome script provides experience like All-in-One Sidebar.
Free • Open Source
What is Sidebar Switch?
A switch for Firefox's native sidebar (bookmarks, history, etc). Works on Firefox quantum (57+). It's a slim vertical button on left of main content.
Replace the legacy addon All in One Sidebar. You can open sidebar by clicking edge of screen.