Apr 09, 2021 Firefox 28.0.0 Controls your Internet surfing 4.2 (41,137 votes) 87.0 (See all). If not please click here: Firefox 28.0 (24.03 MB) Supported Systems. Windows XP, Windows XP x64, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64, Windows. Installing Firefox was a fine, quick experience.A new feature checks your add-ons to see which ones you installed and which ones come from third-party vendors, such as security suite makers. The browser will now ask you if you'd like to disable any of these third-party add-ons.

A faster, more secure and customizable Web browser.

Mozilla Firefox is a fast, light and tidy open source web browser. At its public launch in 2004 Mozilla Firefox was the first browser to challenge Microsoft Internet Explorer’s dominance. Since then, Mozilla Firefox has consistently featured in the top 3 most popular browsers globally and this is set to continue thanks to the release of Firefox 30. The key features that have made Mozilla Firefox so popular are the simple and effective UI, browser speed and strong security capabilities. The browser is particularly popular with developers thanks to its open source development and active community of advanced users.

• Mozilla Firefox is a fast, light and tidy open source web browser. At its public launch in 2004 Mozilla Firefox was the first browser to challenge Microsoft Internet Explorer’s dominance. Since then, Mozilla Firefox has consistently featured in the top 3 most popular browsers globally and this is set to continue thanks to the release of.
• Firefox remote protocol command mappings updated. All Marionette commands changed to make use of the WebDriver: prefixes introduced with Firefox 56. Overhaul of Firefox preferences. Already deprecated preferences in Firefox versions earlier than 57 got removed. Webdriver crate upgraded to 0.36.0. Force use of IPv4 network stack.

Easier Browsing

Mozilla put of a lot of resources into creating a simple but effective UI aimed at making browsing quicker and easier. They created the tab structure that has been adopted by most other browsers. In recent years Mozilla has also focused on maximizing browsing area by simplifying toolbar controls to just a Firefox button (which contains settings and options) and back/forward buttons. The URL box features direct Google searching as well as an auto predict/history feature called Awesome Bar. On the right side of the URL box there are bookmarking, history and refresh buttons. To the right of the URL box is a search box which allows you to customize your search engine options. Outside of that a view button controls what you see below the URL. Next to that you have the download history and home buttons.

Speed

Mozilla Firefox boasts impressive page load speeds thanks to the excellent JagerMonkey JavaScript engine. Start up speed and graphics rendering are also among the quickest in the market. Firefox manages complex video and web content using layer-based Direct2D and Driect3D graphics systems. Crash protection ensures only the plugin causing the issue stops working, not the rest of the content being browsed. Reloading the page restarts any affected plugins. The tab system and Awesome Bar have been streamlined to launch/get results very quickly too.

Security

Firefox was the first browser to introduce a private browsing feature which allows you to use the internet more anonymously and securely. History, searches, passwords, downloads, cookies and cached content are all removed on shutdown. Minimizing the chances of another user stealing your identity or finding confidential information. Content security, anti-phishing technology and antivirus/antimalware integration ensures your browsing experience is as safe as possible.

Personalisation & Development

One of the best features of the Firefox UI is customization. Simply right click on the navigation toolbar to customize individual components or just drag and drop items you want to move around. The inbuilt Firefox Add-ons Manager allows you to discover and install add-ons within the browser as well as view ratings, recommendations and descriptions. Read about the top recommended add-ons for Mozilla Firefox on TechBeat. Thousands of customizable themes allow you to customize the look and feel of your browser. Site authors and developers can create advanced content and applications using Mozilla’s open source platform and enhanced API.

• Firefox keeps getting faster as a result of significant updates to SpiderMonkey, our JavaScript engine, you will now experience improved page load performance by up to 15%, page responsiveness by up to 12%, and reduced memory usage by up to 8%. We have replaced part of the JavaScript engine that helps to compile and display websites for you, improving security and maintainability of the engine at the same time.
• Firefox introduces HTTPS-Only Mode. When enabled, this new mode ensures that every connection Firefox makes to the web is secure and alerts you when a secure connection is not available. You can enable it in Firefox Preferences.
• Pinch zooming will now be supported for our users with Windows touchscreen devices and touchpads on Mac devices. Firefox users may now use pinch to zoom on touch-capable devices to zoom in and out of webpages.
• Picture-in-Picture now supports keyboard shortcuts for fast forwarding and rewinding videos: use the arrow keys to move forward and back 15 seconds, along with volume controls.
• When you are presenting your screen on a video conference in Firefox, you will see our improved user interface that makes it clearer which devices or displays are being shared.
• Selecting a search engine at the bottom of the search panel now enters search mode for that engine, allowing you to see suggestions (if available) for your search terms. The old behavior (immediately performing a search) is available with a shift-click.
• When Firefox autocompletes the URL of one of your search engines, you can now search with that engine directly in the address bar by selecting the shortcut in the address bar results.
• We’ve added buttons at the bottom of the search panel to allow you to search your bookmarks, open tabs, and history.
• Firefox supports AcroForm, which will allow you to fill in, print, and save supported PDF forms and the PDF viewer also has a new fresh look.
• For the recently released Apple devices built with Apple Silicon CPUs, you can use Firefox 83 and future releases without any change. This release (83) will support emulation under Apple’s Rosetta 2 that ships with macOS Big Sur. We are working toward Firefox being natively-compiled for these CPUs in a future release.
• Screen reader features which report paragraphs now correctly report paragraphs instead of lines in Google Docs.
• When reading by word using a screen reader, words are now correctly reported when there is punctuation nearby.
• The arrow keys now work correctly after tabbing in the picture-in-picture window.
• For users on macOS restoring a session with minimized windows, Firefox now uses much less power and you should see much longer battery life.
• Developers can use the scroll badge in the Page Inspector to Debug scrollable overflow. Selecting the badge highlights elements that are causing overflow and marks them with the overflow badge.

Firefox 28 was released on March 18, 2014. This article lists key changes that are useful not only for web developers, but also Firefox and Gecko developers as well as add-on developers.

Changes for Web developers

Firefox 28 Windows 2000

Developer Tools

Mozilla Firefox 28

• The console.exception property has been added (bug 922214).
• The console.assert property has been added (bug 760193).
• App Manager: a new Manifest Editor was added.
• App Manager: the toolbox used for debugging apps is now embedded in the app manager UI.
• Web Console: added a 'split console' mode - press Escape to quickly open the console in any other tool.
• Web Console: added a dark theme for the output.
• Debugger: pretty-print minified JavaScript.
• Debugger: hover over any variable or click on it to bring up a pop-up that displays the current value.
• Inspector: added a color picker in rules view and various tooltips.
• Browser Toolbox: allows add-on and platform developers to use almost all of the developer tools while targeting the browser itself.

More details in this post.

CSS

• Support for multi-line flexbox has been added (bug 939901).
• Longhand East Asian counter styles have been implemented (bug 934072).
• Experimental support for the background-blend-mode property has been added, but is disabled by default (bug 841601).
• The none value has been added to font-variant-ligatures (bug 913264).
• Support for the :hover user action pseudo-class on pseudo-elements has been implemented (bug 922669).

HTML

• <input type=color> and <input type=number> have been implemented, disabled by default.

JavaScript

• ECMAScript 2015 implementation continues:
  • New Array methods have been implemented: Array.prototype.entries() and Array.prototype.keys() (bug 894658).
• A bug causing that Object.getOwnPropertyNames() did not see unresolved properties of Error objects has been fixed (bug 724768).

Interfaces/APIs/DOM

• HTMLVideoElement.canPlayType('video/webm') now reports maybe. (bug 884275).
• The DocumentFragment.getElementById() method has been implemented. E.g. document.createDocumentFragment().getElementById() (bug 933193).
• The KeyboardEvent.repeat attribute has been implemented (bug 600117).
• The File constructor, e.g. new File(['foo'], 'foo.txt') has been implemented. (bug 819900).
• The navigator.plugins is no more enumerable, for privacy reasons (bug 757726).
• The two attributes Window.screenX and Window.screenY now return CSS pixels (and no more device pixels) (bug 943668).
• The two methods CanvasRenderingContext2D.drawSystemFocusRing() and CanvasRenderingContext2D.drawCustomFocusRing() have been implemented. The preference canvas.focusring.enabled must be set to true to activate both (bug 540456).
• The willReadFrequently context attribute for '2d' canvas contexts has been implemented (see HTMLCanvasElement.getContext()) (bug 884226).
• The following attributes and methods of NavigatorID have been implemented on WorkerNavigator to allow their use in workers: appCodeName, product, and taintEnabled() (bug 925847).
• The previousElementSibling and nextElementSibling properties has been removed from DocumentType, because of compatibility problems (bug 932501).

MathML

• Support of the mathvariant attribute has been added (bug 114365).

SVG

Firefox 28.0

Audio/Video

• Opus in WebM is now supported (bug 887978).
• The VP9 video decoder is now supported (bug 833023).

Network

Changes for addon and Mozilla developers

• The interface of DeferredTask.jsm has been changed, and the isPending(), start(), flush(), and cancel() methods have been removed (bug 940408).

Download Firefox 28.0

Security

• CSP was not enforced in sandboxed iframes. This has been fixed (bug 886164).
• The CSP 1.1 experimental script-nonce directive has been implemented. The preference security.csp.experimentalEnabled should be set to true to enable this functionality (bug 855326).

See also

Older versions