The new release, which was announced today on the Mozilla Blog, also adds better support for Apple's latest desktop interface, Mac OS X Lion, including support for two-finger swipe gestures and a more Lion-like interface design.
With this release, Mozilla has also updated Firefox for Android. New for the mobile browser is tablet optimization for landscape and portrait orientation. Thumbnails now appear alongside the screen for each open tab, and swiping is supported. Users can also add site bookmarks to their Android home screen for app-like access.
A new Action Bar menu lets Android users access Firefox Preferences, Add-ons, and downloads. It also sports back, forward and bookmark buttons, according to the blog post.
Finally, the Android version of Firefox 9 lets sites access the mobile device's camera and supports HTML5 Form Validation, "which automatically validates Web site form fields like numbers, emails and URLs without developers needing to write a custom code or use a third-party library."
It's anyone's guess as to whether Firefox will be able to stem the onslaught from Google, but it clearly won't be for lack of constant improvements from the Mozilla team. You can try out Firefox 9 for yourself, by heading to the Firefox download page. Versions are available for Windows 7, Vista, and XP; Mac OS X; and Linux in dozens of languages. The Android version is available from the Android Market.