The entire page will be fading to dark, so you can watch the video as if you were in the cinema.
Expands the context menu's 'Search for' item into a list of installed search engines, allowing you to choose the engine you want to use for each search.
Bookmark Deduplicator just provides an easy way to remove duplicate bookmarks.
Create and manage tab groups in a side-by-side list-view interface, or "Groups Bar" toolbar interface. Single or multi-tab close, bookmark, or move across groups. Search for tabs by title or content in current or all groups. Much more...
Transforms "List all tabs" menu to do closing, loading, unloading, moving of single/multiple tabs. Search tab titles or *content* (remember "Find In Tabs"?), visited tabs history, find duplicate tabs - very helpful for mega-tab users. And more...
Shows an icon in the tab of each tab currently playing an HTML5 video or audio.
Show less chrome by default unless it's needed
Two-pane bookmark manager ("Total commander"/"FAR" like bookmark manager)
With this extension you can save HTML pages like in Microsoft Internet Explorer. Default filename is generated according to HTML tag TITLE.
Add Unsorted Bookmarks item to Firefox Toolbar