SEO Status PageRank/Alexa Toolbar Requires Restart
See Google Pagerank (PR) and Alexa rank for each website you visit. Simple and customizable. You can see and use everything the toolbar offers, or strip it down to the bare essentials and place it in the status bar. Simple, quick, and very useful.
Add Bookmark Here ² Requires Restart
Add a menuitem "Add Bookmark Here..." to Bookmarks...
Save anything on the web to OneNote. Clip it to OneNote, organize and edit it, then access it from any device.
Directly Download PDF without opening in the viewer.
NewsFox Requires Restart
NewsFox is an efficient 3-pane(email) style Atom/RSS feed reader.
Vacuum Places Improved Requires Restart
Defragments your Firefox "Places" database (history/bookmarks)
This greatly reduces the lag while typing in the address bar and the start-up time.
This extension features configurable automatic cleaning, periodic reminder, and internationalization.
Ant.com Antmarks Extension Requires Restart
Manage your favorite web pages
Google Shortcuts - All Google Services at a glance Requires Restart
Display all Google services as buttons or as a space-saving dropdown menu next to your address bar. Reach services like Gmail, Google reader, Google maps, Google calendar, and many more in a single click from your browser.
Add to Wunderlist is the easiest way to save anything from the web to your Wunderlist.
Update Scanner Requires Restart
Monitors web pages for updates. Useful for websites that don't provide Atom or RSS feeds.
PlainOldFavorites Requires Restart
Use Windows and Internet Explorer Favorites directly from Firefox. No need to import, export or synchronize - the same Favorites appear...
Personal Menu (Personal Firefox Button) Requires Restart
Bring back your personal and powerful Firefox Button!
Multirow Bookmarks Toolbar Plus Requires Restart
Display your Bookmarks Toolbar in more than one row! Be smart about hiding text and only showing favicons, displaying website info as tooltips. Autohide the Bookmarks Toolbar.
FavIcon Reloader up to FF 48 only Requires Restart
FavIconReloader reloads Favourite Icons by retrieving information from all bookmarked web sites.
Bookmark Deduplicator just provides an easy way to remove duplicate bookmarks.
Notepad (QuickFox) Requires Restart
Everyday note-taking solution.
This is an official AmazonSmile extension for Firefox
Pearltrees lets you organize all your interests.
Multirow Bookmarks Toolbar Requires Restart
Makes your Bookmarks Toolbar appear in multiple rows.
For Firefox 4 use: Multirow Bookmarks Toolbar Plus, available here:
Todoist is the beautifully simple to-do list built to help you do more and stress less.
Watch these intro videos 30 sec