new 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.

Short and sweet, Firefox uses less of your computer’s memory while it’s running.

With a new management function in place, Firefox keeps memory usage under control. The XPCOM cycle collector continuously cleans up unused memory. Plus, hundreds of memory leaks have been remedied.

A redesigned page rendering and layout engine means you see Web pages faster—and in the way they were meant to be seen.

improved The colors in your online photo albums will be sharper and more brilliant than ever, thanks to improvements to our graphics engine.

Shop and do business safely on the Internet. Firefox gets a fresh update of web forgery sites 48 times in a day, so if you try to visit a fraudulent site that’s pretending to be a site you trust (like your bank), a browser message—big as life—will stop you.

Enforce parental control settings you’ve entered on Vista—stop unwanted downloads and more.

improved Clear all your private data or just your activity over the past few hours with a few quick clicks. You have full control over what to delete, and then your info is gone for good—on your own computer or the one at your local library. It’s that easy.

Control the level of scrutiny you’d like Firefox to give a site and enter exceptions—sites that don’t need the third degree. Customize settings for passwords, cookies, loading images and installing add-ons for a fully empowered Web experience.

Firefox integrates elegantly with your antivirus software. When you download a file, your computer’s antivirus program automatically checks it to protect you against viruses and other malware, which could otherwise attack your computer.

Banish pop-ups (and pop-under windows) from your surfing experience once and for all. Or, find a happy medium—choose to view blocked pop-ups or create an “allow” list of sites whose pop-ups you’re okay with seeing.

Our open-source security strategy lets us find—and fix—security issues in record time, making Firefox the safest way to surf. Install upgrades when you receive automatic notification or wait until you’re ready.

Firefox looks for a secure connection before installing or updating add-ons, 3rd party software, and Personas.

We’ve seamlessly integrated this feature into your surfing experience. Choose to “remember” site passwords without intrusive pop-ups. Now you’ll see the “remember password” notification integrated into your view at the top of the site page.