{"id":61883,"date":"2011-03-22T00:00:00","date_gmt":"2011-03-22T00:00:00","guid":{"rendered":"http:\/\/blog.mozilla.org\/foxtail\/2011\/03\/22\/mozilla-launches-firefox-4-and-delivers-a-fast-sleek-and-customizable-browsing-experience-to-more-than-400-million-users-worldwide-2\/"},"modified":"2021-02-08T20:32:13","modified_gmt":"2021-02-08T20:32:13","slug":"mozilla-launches-firefox-4-and-delivers-a-fast-sleek-and-customizable-browsing-experience-to-more-than-400-million-users-worldwide-2","status":"publish","type":"post","link":"https:\/\/blog.mozilla.org\/en\/mozilla\/mozilla-launches-firefox-4-and-delivers-a-fast-sleek-and-customizable-browsing-experience-to-more-than-400-million-users-worldwide-2\/","title":{"rendered":"Mozilla Launches Firefox 4 and Delivers a Fast, Sleek and Customizable Browsing Experience to More Than 400 Million Users Worldwide"},"content":{"rendered":"<p>Mozilla, a global, nonprofit organization dedicated to making the Web better, is  proud to release Mozilla Firefox 4, the newest version of the popular, free and open source Web browser. Firefox puts users in control of their Web experience, providing a streamlined user interface, fun new  features, a boost in speed and support for modern Web technologies.<\/p>\n<p>Firefox 4 is available to <a href=\"http:\/\/www.mozilla.com\/firefox\">download <\/a>for Windows, Mac OS X and Linux in more than 80 languages. Firefox 4 will also be available on Android and Maemo devices soon.<br \/>\n<video width=\"852\" height=\"480\" controls><source src=\"https:\/\/videos-cdn.mozilla.net\/serv\/marketing\/firefox4\/FF4_VO_1_852x480p.mp4\"  type=\"video\/mp4\" \/><source src=\"https:\/\/videos-cdn.mozilla.net\/serv\/marketing\/firefox4\/FF4_VO_1_852x480p.webm\" type=\"video\/webm\" \/><source src=\"https:\/\/videos-cdn.mozilla.net\/serv\/marketing\/firefox4\/FF4_VO_1_852x480p.theora.ogv\"  type=\"video\/ogg\" \/><object width=\"640\" height=\"360\" type=\"application\/x-shockwave-flash\" data=\"https:\/\/www.youtube.com\/watch?v=hPm5A265q_s\"><param name=\"movie\" value=\"https:\/\/www.youtube.com\/watch?v=hPm5A265q_s\" \/><\/object><\/video><\/p>\n<p>Firefox 4 is the fastest Firefox yet. With dramatic speed and performance  advancements across the board, Firefox is between two and six times  faster than previous releases. Major enhancements to the JavaScript  engine make everything from startup time to page load speed to graphics  and JavaScript performance screaming fast in Firefox.<\/p>\n<p>The latest version of Firefox introduces a sleek new look<\/a> that lets Web content take center stage. With <a href=\"http:\/\/www.mozilla.com\/firefox\/features\/\">features<\/a> like App Tabs and Panorama, Firefox makes it easier and more efficient  to navigate the Web. Firefox delivers industry-leading privacy and  security features like Do Not Track and Content Security Policy to give  users control over their personal data and protect them online.<\/p>\n<p><a href=\"http:\/\/www.mozilla.com\/mobile\/sync\/\">Firefox Sync<\/a> gives users access to their Awesome Bar history, bookmarks, open tabs  and passwords across computers and mobile devices. Firefox also offers <a href=\"https:\/\/addons.mozilla.org\/\">hundreds of thousands of add-ons, extensions and Personas<\/a> and a new Firefox Add-ons Manager to make it easy for users to manage and discover add-ons to customize their Web experience.<\/p>\n<p>Firefox  supports modern Web technologies, including HTML5. These technologies  are the foundation for building amazing websites and Web applications.  Go to<a href=\"https:\/\/demos.mozilla.org\/\"> Web O\u2019 Wonder<\/a> and check out the incredible online experiences developers can now create.<\/p>\n<p>==============================================================<br \/>\nWhat\u2019s New in Firefox 4:<\/p>\n<p>Fastest Firefox Ever<\/p>\n<ul>\n<li>Performance:  Firefox is up to six times faster than the previous release. With  improved start-up and page load times, speedy Web app performance and  hardware accelerated graphics, Firefox is optimized for rich,  interactive websites.<\/li>\n<\/ul>\n<p>Streamlined Interface<\/p>\n<ul>\n<li>App Tabs: give a permanent home to frequently visited sites like Web mail, Twitter, Pandora, Flickr.<\/li>\n<li>Switch to Tab: easily find and switch to any open tab from your Awesome Bar without opening duplicate tabs.<\/li>\n<li>Panorama: drag and drop tabs into manageable groups to save time while navigating many open tabs.<\/li>\n<\/ul>\n<p>Private and Secure Synchronization<\/p>\n<ul>\n<li>Firefox  Sync: access your Awesome Bar history, bookmarks, open tabs, passwords  and form data across multiple computers and mobile devices.<\/li>\n<\/ul>\n<p>Most Customizable<\/p>\n<ul>\n<li>New Add-ons Manager: <a href=\"http:\/\/blog.mozilla.org\/addons\/2011\/03\/22\/firefox-4-add-ons\/\">easily discover and install more than 200,000 add-ons<\/a> to customize the features, functionality and look of Firefox.<\/li>\n<\/ul>\n<p>Private and Secure<\/p>\n<ul>\n<li>Do  Not Track: Firefox is leading the Web towards a universal standard Do  Not Track feature that allows users to opt-out of tracking used for  behavioral advertising.<\/li>\n<li>Firefox puts privacy first, fixing flaws in some Web standards to prevent others from accessing your browser history.<\/li>\n<li>HTTP  Strict Transport Security (HSTS): automatically establishes secure  connections to stop \u201cman in the middle\u201d attacks and keep sensitive data  safe from interception during the log-in process.<\/li>\n<li><a href=\"http:\/\/blog.mozilla.org\/security\/2011\/03\/22\/creating-a-safer-web-with-content-security-policy\/\">Content Security Policy (CSP)<\/a>: prevent cross-scripting attacks by allowing sites to explicitly tell the browser which content is legitimate.<\/li>\n<\/ul>\n<p>Cutting Edge Tools for Web Developers:<\/p>\n<ul>\n<li>The  JavaScript engine incorporates the new J\u00e4gerMonkey JIT compiler, along  with enhancements to the existing TraceMonkey JIT and SpiderMonkey\u2019s  interpreter for faster page-load speed and better performance of Web  apps and games.<\/li>\n<li>HTML5  support in Firefox includes hardware accelerated, high-definition video  (WebM), 3D graphics, offline data storage, professional typography,  touchscreen interfaces and the Mozilla Audio API to help create visual  experiences for sound and <a href=\"https:\/\/mozillademos.org\/demos\/dashboard\/demo.html\">more<\/a>.<\/li>\n<li>Firefox 4 also improves existing tools like CSS, Canvas and SVG to enable developers to make exciting Web pages.<\/li>\n<li>Firefox  provides uninterrupted browsing when there is a crash in the Adobe  Flash, Apple QuickTime or Microsoft Silverlight plugins. If one of these  plugins crashes or freezes, it won&#8217;t affect the rest of Firefox. Simply  reload the page to restart the plugin.<\/li>\n<\/ul>\n<p>\u00a0<br \/>\nFor more information:<\/p>\n<ul>\n<li><a href=\"http:\/\/www.mozilla.com\/firefox\/video\/?video=fx4-whatsnew\">Video tour of what\u2019s new in Firefox 4<\/a><\/li>\n<li><a href=\"http:\/\/www.mozilla.com\/firefox\/features\/\">Full details on Features<\/a><\/li>\n<li><a href=\"http:\/\/www.stage.mozilla.com\/press\/kits\/\">Firefox 4 Reviewer\u2019s Guide<\/a><\/li>\n<li><a href=\"http:\/\/www.mozilla.com\/press\/media\/logos\/\">Screenshots and logos<\/a><\/li>\n<li><a href=\"https:\/\/www.mozilla.com\/firefox\/4.0\/releasenotes\/\">Long, technical release notes<\/a><\/li>\n<li><a href=\"http:\/\/glow.mozilla.org\/\">Share Firefox 4 with your friends on Facebook and Twitter<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Mozilla, a global, nonprofit organization dedicated to making the Web better, is proud to release Mozilla Firefox 4, the newest version of the popular, free and open source Web browser. Firefox puts users in control of their Web experience, providing a streamlined user interface, fun new features, a boost in speed and support for modern [&hellip;]<\/p>\n","protected":false},"author":144,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30,5],"tags":[],"coauthors":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Mozilla Launches Firefox 4 and Delivers a Fast, Sleek and Customizable Browsing Experience to More Than 400 Million Users Worldwide<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.mozilla.org\/en\/mozilla\/mozilla-launches-firefox-4-and-delivers-a-fast-sleek-and-customizable-browsing-experience-to-more-than-400-million-users-worldwide-2\/\" 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