Firefox is the browser of choice for many keen Internet users and is one of the best browsers.Firefox is Open source..
# Add to Search Bar - Make any pages' search functionality available in the Search Bar
# AutoPager - Automatically loads next pages when you reach the end of a page
# Google Shortcuts - Display all of your Google Services as buttons anywhere you like
# Greasemonkey - Customize any site using thousands of user scripts
# Menu Editor - Rearrange menu items in the context menu and the main menu bar
# New Tab King - Adds most visited sites, recently closed tabs, and suggested sites to new tabs
# Organize Search Engines - Organize your search engines with separators and folders
# Samfind Bookmarks Bar - Quickest, easiest way to access your favorite websites
# Speed Dial - Direct access to your most visited websites
# KwiClick - Delivers search results in a small popup window for any selected text
# Tab Mix Plus - Duplicate tabs, control tab focus, undo closed tabs and windows, etc.