Combine the navigation bar and tab bar into one line with a button for search.
Create Prism applications directly from Firefox
A more powerful search engine for Firefox history, RecallMonkey lets you effectively search through websites you've visited and effectively filter results to find pages you've seen before!
Fill in the rest of words as you type them into the location bar
Analyze your local browser data and summarize it into a visual profile.
Start loading pages as you select them from the location bar suggestions
Suggest words from the page when finding
Find stuff instantly from a dashboard that appears over a full-window browsing experience.
Track tracking sites and automatically block them.
Find pages from your history, on the web, for a particular category.