Faster, Safer, Smarter, Better, The Fastest Firefox Yet. Firefox 3.5.5 is now available, it is strongly recommended that all Firefox 3.5 users upgrade to this latest release.
Fasten your seatbelt: Firefox 3.5 includes the TraceMonkey JavaScript engine, which gives the browser dramatically better performance than ever before. Firefox has always been fast, but this is the fastest Firefox ever (more than twice as fast as Firefox 3, and ten times as fast as Firefox 2), meaning Web applications like email, photo sites, online word processors and more will feel snappier and more responsive.
Top Features

• Private Browsing -new Surf the Web without leaving a single trace.
• Password Manager – Remember site passwords without ever seeing a pop-up.
• Awesome Bar – improved Find the sites you love in seconds (and without having to remember clunky URLs).
• Super Speed – new View Web pages way faster, using less of your computer’s memory.
• Anti-Phishing & Anti-Malware – improved Enjoy the most advanced protection against online bad guys.
• Session Restore – improved Unexpected shutdown? Go back to exactly where you left off.
• One-Click Bookmarking – Bookmark, search and organize Web sites quickly and easily.
• Easy Customization – improved Thousands of add-ons give you the freedom to make your browser your own.
• Tabs – improved Do more at once with tabs you can organize with the drag of a mouse.
• Instant Web Site ID – Avoid online scams, unsafe transactions and forgeries with simple site identity.

Please note that Linux distributors may provide packages for your distribution which have different requirements.

• Firefox will not run at all without the following libraries or packages:
  • GTK+ 2.10 or higher
  • GLib 2.12 or higher
  • Pango 1.14 or higher
  • X.Org 1.0 or higher
• For optimal functionality, we recommend the following libraries or packages:
  • NetworkManager 0.7 or higher
  • DBus 1.0 or higher
  • HAL 0.5.8 or higher
  • GNOME 2.16 or higher

Firefox 3.5.5 fixes the following issues
* Fixed several stability issues.