You can choose items displayed in the sidebar.
This extension did not work in MacOS X.
Use Windows and Internet Explorer Favorites directly from Firefox. No need to import, export or synchronize - the same Favorites appear...
Add Unsorted Bookmarks Folder to Bookmarks Menu
Allows Personas to work in private browsing windows
A tree of the bookmarks is displayed under search results of the sidebar bookmarks.
A location of the bookmark concerned is shown on the tree when you choose a bookmark of search results.
Displays a timeline of the current active tab's history in a sidebar.
Dynamic creation of bookmark-style toolbar buttons which you can customize.
Hide developer-related stuff from Firefox interface, including the “Inspect Element (Q)” menu item.
Firefox for Windows only.
Quickly accessing Options pane from Firefox Options menu.
Supports ALL languages.
An extension replacing the right-click menu of Firefox with a doughnut-shaped menu.