Xmarks is the #1 bookmarking and open tab add-on. Keep your bookmarks, and open tabs backed up and synchronized across computers and browsers. Mobile phones with Premium access. Utilize LastPass to sync passwords!
When you find something on the web that you want to view later, put it in Pocket. It automatically syncs to your phone, tablet or computer so you can view it at any time, even without an internet connection.
Makes your Bookmarks Toolbar appear in multiple rows.
For Firefox 4 use: Multirow Bookmarks Toolbar Plus, available here:
TooManyTabs allows you to store as many tabs as you like by adding extra rows in the Firefox! It saves your browser's space and memory as idle tabs are put aside. The extra rows also help to better prioritize and visualize your tabs.
GMarks helps you sync & manage your bookmarks with Google Bookmarks...
Enable multi-color highlighter and post-it notes as your reading aids; Capture the whole page or any portion to share or archive; Save everything online to allow access anywhere. See Youtube http://bit.ly/g5GvDw
Creates a menu to access google bookmarks from any computer. Needs Google Account to use this extension.
Add-on for Firefox that gives you a super-fast way to to open your favorite sites using keyboard shortcuts. Pressing Ctrl + Space invokes the 'Launcher' followed by a single key press to open a specific site. Example: open Facebook by Ctrl+Space, F.
This provides separated "Bookmarks" Sidebar panel like Opera.