Firefox offers users complete control over the look and functionality of their Web browser with a gallery of hundreds of thousands of add-ons. About 85% of Firefox 4 users have an add-on installed to customize the look, features and functionality of their Firefox.
Firefox for Windows, Mac and Linux now supports the CSS Animations standard to enable developers to build more amazing Web applications and websites. Mozilla Hacks has a tutorial on CSS Animations and a comprehensive blog post explaining what developers can create with Firefox.
To get the latest version of Firefox for Windows, Mac or Linux click on “check for update” under the “About Firefox” menu or download the Firefox Aurora and Beta channels here. Visit this page to get the latest version of Firefox on your Android device or to join the beta. Users with Firefox for Android installed will receive a notification to update to the latest version