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While you should clear your web browser's cache, cookies, and history periodically in order to prevent or resolve performance problems, you may wish to record some of your saved information first. If you are unable to do so, see Troubleshooting alternatives below. If you don't see instructions below for your specific version or browser, search your browser's Help menu for "clear cache".

If you're unsure what browser version you're using, from the Help menu or your browser's menu, select About [browser name]. In Internet Explorer and Firefox, if you don't see the menu bar, press Alt. If you need to clear your cache, cookies, and history for troubleshooting purposes, but aren't yet prepared to lose the content listed above, you may wish to consider using a private browsing window in your preferred browser as a temporary solution:.

The steps to clear your cache, cookies, and history may differ depending on the model of your Android device and your preferred browser, but you should be able to clear your cache and data from your application management settings menu:. From the "Time range" drop-down menu, you can choose the period of time for which you want to clear cached information. To clear your entire cache, select All time. This is document ahic in the Knowledge Base.

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Namespaces Article Talk. Views Read View source View history. This page was last edited on 19 February , at By using this site, you agree to the Terms of Use and Privacy Policy. First release. Official version 0. Bugfix release. Technology Preview. Three Kings. Bugfix release for Mac OS X only. One Tree Hill. Comprehensive Data Migration from Internet Explorer. Bugfix release Updated default theme [14]. Vulnerability patch for Windows only. Vulnerability patch.

Firefox 1. Mission Bay. Official version 1. Regular security and stability update. Installer improvements. Sanitize privacy feature. Improvements in JavaScript 1. Broken website reporter tool. Prettier error pages, more Luna-like Winstripe theme did not blend well with the Classic theme. Several security fixes. Off-cycle security update.

Regression fixes. Firefox 2. Official version 2. Visual Refresh of main theme Built-in phishing protection Enhanced search capabilities Improved tabbed browsing Resuming your browsing session session restore Previewing and subscribing to Web feeds Inline spell checking Live Web Titles Improved Add-ons manager JavaScript 1. Close button on every tab. Inline spell checking for text boxes.

Session restoration after browser crash. Search suggestion for Google and Yahoo!. New search plugin manager and add-on manager. Web feed previewing. Bookmark microsummaries. Updates to extension system. Support for Sherlock and OpenSearch. Support for SVG text using svg: Search suggestions appear with search history in the search box for Google and Yahoo!.

Support for client-side session and persistent storage. New NSIS -based installer. JavaScript 1. Enhanced security and localization support for extensions. Windows Vista support. Regression fixes and security fixes. Security and stability update. Mac OS X Firefox 3. Official version 3. Better protection against cross-site JSON data leaks.

Optimized Open in Tabs behavior Location and Search bar size can now be customized with a simple resizer item. Text selection improvements select multiple selections of text Find toolbar: Smart Bookmark Folders Web-based protocol handlers for mail: CSS SVG Display of fonts with ligatures and complex scripts Color management of images with capabilities Offline support for web applications Improved speed Reduced memory usage Increased reliability total code changes Security fixes Stability fixes Changes during alphas Cairo graphics library.

Cocoa Widgets in OS X builds. Updated threading model. Web Apps 1. Inline-block and inline-table values of CSS 2. XML documents can be rendered during download. Greatly improved Mac widgets support since Alpha 1. Improvements in Cairo graphics layer. Non-standard JavaScript "Script" object no longer supported. Support for Animated PNG images. Improvements to layout and scaling precision across numerous screen and printer resolutions.

Rewrite of Page Info dialog. Upgrade to Cairo 1. More Cocoa regression fixes. Password manager rewrite. Site-specific preference service, used initially for text zoom, allowing zoom setting to remain on each website. Support for native widgets within forms for Linux. New Quit dialog handles multiple windows more elegantly and allows users to save session. Autoscroll rewrite: Fixes to the use of units within the download manager. Various Places bug fixes. New protocol-handling dialog. Experimental full-page zoom support, but no UI to control it.

General bug fixes. Remember password prompt changed to non-modal information bar. Malware blacklist support. Applications pane added to preferences. Basic support for web-based protocol handlers. Various stability and performance improvements. Different default native themes for each operating system. Upgraded to SQLite 3. Various improvements in speed and resource usage. Bug fix for retrieving and saving passwords. Changes during alphas Web standards improvements. Support for using border images. Support for DOM query selectors. Improvements to Smart Location Bar.

New tab-switching behavior. Changes during betas Web standards improvements in Gecko layout engine. Added support for CSS 2. New tab-switching shortcut that shows previews of the tab user is switching to. Improved control over Smart Location Bar using special characters to restrict your search. Support for new web technologies.

Added new Private Browsing Mode. Added functions to facilitate clearing recent history by time as well as to remove all traces of a website. New support for web worker threads. New TraceMonkey JavaScript engine on by default for web content. Improvements to Gecko layout engine, including speculative parsing for faster content rendering. Removed new tab-switching behavior based on user feedback.

Improved new Private Browsing Mode. Improvements to web worker thread support. Improved performance and stability with the TraceMonkey JavaScript engine. New native JSON support. Available in 70 languages. Improved tools for controlling private data, including Private Browsing Mode. Better performance and stability with new TraceMonkey JavaScript engine. Ability to provide Location Aware Browsing using web standards for geolocation. Support for native JSON, and web worker threads. Fixed several security issues Fixed several stability issues [] End-of-life 3. Official Firefox 3. Open, native video can now be displayed full screen and supports poster frames.

Improved JavaScript performance, overall browser responsiveness, and startup time. The ability for web developers to indicate that scripts should run asynchronously to speed up page load times. Continued support for downloadable web fonts using the new WOFF font format. Support for new CSS attributes such as gradients, background sizing, and pointer events.

Changes to how third-party software can integrate with Firefox in order to prevent crashes. Changes during alphas Compositor Phase 1 , which moves Gecko to using one native widget per top-level content document. A new focus model. The chromedir attribute has been replaced with a pseudoclass.

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Several new CSS3 properties including background size and gradients for background images. Speed improvements to the TraceMonkey JavaScript engine. Startup and responsiveness improvements throughout the application. Open, native video can now be displayed full screen, and supports poster frames.

Support for the WOFF font format. Improved JavaScript performance, overall browser responsiveness and startup time. The ability to run scripts asynchronously to speed up page load times. There was no version 3. Quick turn-around security update. First Firefox "Lorentz" beta, followed by 7 more Firefox 3. Regular security and stability update, including OOPP.

Modified crash protection feature to increase amount of time plugins allowed to be non-responsive before being terminated. Fixed issue where some Java applets failed to load in Firefox 3. Turned off downloadable font support for users running Mac OS X No changes made on Windows side. Firefox 4. Official Firefox 4. Changes during alphas Support for WebGL Disabled by default, but can be enabled by changing a preference. Plugin crashes will not kill Firefox itself, and unresponsive plugins are automatically restarted.

The SSL security system has been changed to fix a renegotiation flaw. Link history lookup is now performed asynchronously on a thread. Loading the HTML5 specification no longer causes very long browser pauses. Some JavaScript engine improvements. The stop and reload buttons have been merged when they are adjacent on the toolbar.

More performance and stability improvements. Mozilla now uses an infallible allocator. Additional fixes for multi-process plugins. Currently loaded web pages are shown in the location bar autocomplete list, allowing switching to existing tabs. Full-screen video on Windows is now rendered using hardware acceleration when available. Linux builds are now built with -fomit-frame-pointer. New Addons Manager placeholder UI only.

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Tab on Top can now be implemented. Firefox now uses hardware acceleration for video playback. ChromeWorker with jsctypes support. Lazy frame construction for faster dynamic pages. JavaScript performance improvements. Loading the URL about: On Windows Vista and Windows 7 the menu bar has been replaced with the Firefox button. The Bookmarks Toolbar has been replaced with a Bookmarks Button by default you can switch it back if you'd like. Support for more HTML5 technologies.

App Tabs can now be created. Content animation using CSS Transitions can now be implemented. Responsiveness and scrolling improvements from the new retained layers layout system. JavaScript speed improvements due to engine optimizations. A new way of representing values in JavaScript that allows Firefox to execute heavy, numeric code used for things like graphics and animations more efficiently. Panorama, a new feature that gives users a visual overview of all open tabs, allowing them to be sorted and grouped, is now included.

An experimental API is included to provide more efficient Javascript animations. Firefox now supports the HTML5 video "buffered" property. Direct2D Hardware Acceleration is now on by default for Windows 7 users. Firefox button has a new look for Windows Vista and Windows 7 users. Fixed an issue causing rendering errors with plugins affecting Mac OS X users.

Improved web typography using OpenType with support for ligatures, kerning and font variants. Speed, functionality, and compatibility improvements to WebGL. Additional polish for the Firefox Add-ons Manager. Per-compartment garbage collection is now enabled, reducing work done during complex animations. Improvements in memory usage. Support for a graphics driver blacklist to improve stability.

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Connection status messages are now shown in a small overlay. WebGL has been re-enabled on Linux. The default homepage design has been refreshed. Firefox no longer switches into offline mode automatically. Improved plugin compatibility with hardware acceleration enabled. Hovering over links now displays the URL at the bottom of the window rather than in the location bar. General stability, performance, and compatibility improvements. Added Vietnamese localization, bringing the total languages available in Firefox 4 to Firefox 5.

Official Firefox 5. The Do-Not-Track header preference has been moved to increase discoverability. Tuned HTTP idle connection logic for increased performance. Improved canvas, JavaScript, memory, and networking performance. Improved spell checking for some locales. Improved desktop environment integration for Linux users. WebGL content can no longer load cross-domain textures. Background tabs have setTimeout and setInterval clamped to ms to improve performance. Off-cycle stability update for Mac OS X only.

Firefox 6. Official Firefox 6. The user can choose what information can be shared with sites, e. The address bar now highlights the domain of the website you're visiting.

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Streamlined the look of the site identity block. Added support for window. Added Scratchpad, an interactive JavaScript prototyping environment. Added a new Web Developer menu item and moved development-related items into it. Improved usability of the Web Console. Improved the discoverability of Firefox Sync. Reduced browser startup time when using Panorama. Fixed several stability and security issues. Last release for Android 2. Firefox 7.

Official Firefox 7. Added a new rendering backend to speed up Canvas operations on Windows systems. Bookmark and password changes now sync almost instantly when using Firefox Sync. The http: Added support for text-overflow: Added support for the Web Timing specification. Enhanced support for MathML. The WebSocket protocol has been updated from version 7 to version 8. Added an opt-in system for users to send performance data back to Mozilla to improve future versions of Firefox. Fixed several security and stability issues.

Last release for Maemo. Firefox 8. Official Firefox 8. Added a one-time add-on selection dialog to manage previously installed add-ons. Added Twitter to the search bar. Added a preference to load tabs on demand, improving startup time when windows are restored. Added support for HTML5 context menus. Improved CSS hyphen support for many languages. Improved WebSocket support. Changes during betas Removed support for new tab animation due to incompatibilities with some extensions. Fixed Windows startup crash caused by RoboForm versions older than 7. Firefox 9. Official Firefox 9. Added support for the font-stretch CSS property.

Improved support for the text-overflow CSS property. Firefox Anti-Aliasing for WebGL is now implemented. CSS3 3D-Transforms are now supported. Full Screen APIs allow you to build a web application that runs full screen. Fixed extensions. Addressed a fix that allows specifying wildcard that matches all simple netbiosnames in network. Regular security update. SPDY protocol support disabled by default. Page Inspector Tilt 3D View. Sync Add-ons. Redesigned HTML5 video controls. Style Editor CSS. Firefox is now easier to update with one less prompt User Account Control.

Last release for Windows Page Source now has line numbers. Line breaks are now supported in the title attribute. Improvements to "Find in Page" to center search result. URLs pasted into the download manager window are now automatically downloaded. Support for the text-align-last CSS property has been added. Some TinyMCE-based editors failed to load.

WebGL performance may be degraded on some hardware. The default home page now has quicker access to bookmarks, history, settings, and more. SPDY protocol now enabled by default for faster browsing on supported sites. Restored background tabs are not loaded by default for faster startup. Smooth scrolling is now enabled by default. The column-fill CSS property has been implemented. Support for the CSS3 background-position property extended syntax has been added. The CSS turn angle unit is now supported. Fixed the Hebrew text that was sometimes rendered incorrectly.

Fixed an issue in Adobe Flash Android Official Firefox Mobile Plugins can now be configured to only load on click about: Improved site identity manager, to prevent spoofing of an SSL connection with favicons. Pointer Lock API implemented. New API to prevent your display from sleeping. Long URLs now extend the status bar almost to the whole width of the viewport.

Desktop Official Firefox Desktop Mac OS X: Fixed the nsCocoaWindow:: ConstrainPosition that uses wrong screen in multi-display setup. Fixed the CSS: Background updates. Support for SPDY networking protocol v3. WebGL enhancements, including compressed textures for better performance. Localization in Maithili. Optimized memory usage for add-ons.

JavaScript debugger integrated into developer tools. New layout view added to Inspector. High precision event timer implemented. The CSS word-break property has been implemented. New responsive design tool allows web developers to switch between desktop and mobile views of sites. Native support for the Opus audio format added.

The source element now supports the media attribute. Fixed the focus rings that keep growing when repeatedly tabbing through elements. Acholi and Kazakh localizations added.

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Improvements around JavaScript responsiveness through incremental garbage collection. New Developer Toolbar with buttons for quick access to tools, error count for the Web Console, and a new command line for quick keyboard access. Recently opened files list in Scratchpad implemented. Fixed an issue where debugger breakpoints do not catch on page reload. No longer supporting MD5 as a hash algorithm in digital signatures. Opus support by default. Reverse animation direction has been implemented. Per tab reporting in about: User Agent strings for pre-release Firefox versions now show only major version.

Click-to-play blocklisting implemented to prevent vulnerable plugin versions from running without the user's permission. Updated Awesome Bar experience with larger icons. JavaScript Maps and Sets are now iterable. Sandbox attribute for iframes implemented, enabling increased security. Over twenty performance improvements, including fixes around the New Tab page. Fixed pointer lock that doesn't work in web apps. Fixed page scrolling on sites with fixed headers.

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Regular security and stability updates. Fixed improvements to the Click-to-Play vulnerable plugin blocklisting feature. Preliminary support for WebRTC. Performance improvements around tab switching. Support for new DOM property window. Improvement in startup time through smart handling of signed extension certificates. Support for W3C touch events implemented, taking the place of MozTouch events. Improved responsiveness for users on proxies. Changes during Aurora releases Adds a Metro user interface on Windows 8. Canvas elements can export their content as an image blob using canvas.

Startup performance improvements. Debugger now supports pausing on exceptions and hiding non-enumerable properties. There is now a Browser Debugger available for add-on and browser developers experimental, set devtools. CSS page is now supported. CSS viewport-percentage length units implemented vh, vw, vmin and vmax.



CSS text-transform now supports full-width. Fixed certain valid WebGL drawing operations that were incorrectly rejected, leaving incomplete rendering in affected pages. Fixed an issue that starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode. Fixed plugins that stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode. New download experience. Ability to close hanging plugins, without the browser hanging. Continued performance improvements around common browser tasks page loads, downloads, shutdown, etc.

New JavaScript Profiler tool. Details button on Crash Reporter. Unity plugin that doesn't display in HiDPI mode. Preliminary implementation of Firefox Health Report. Firefox will suggest how to improve your application startup time if needed. Ability to Restore removed thumbnails on New tab Page. CSS -moz-user-select: Graphics related performance improvements. Removed E4X support from SpiderMonkey. Implemented Remote Profiling. Implemented scoped stylesheets. Some function keys may not work when pressed. Browsing and Download history clearing needs unification to avoid confusion on clearing download history.

Firefox now follows display scaling options to render text larger on high-res displays. Download progress in Dock application icon. Social services management implemented in Add-ons Manager. Improved WebGL rendering performance through asynchronous canvas updates. Plain text files displayed within Firefox will now word-wrap. For user security, the Components object is no longer accessible from web content. Improved memory usage and display time when rendering images. Pointer Lock API can now be used outside of fullscreen.

CSS3 Flexbox implemented and enabled by default. New built-in font inspector. Scrolling using some high-resolution-scroll aware touchpads feels slow. Mixed content blocking enabled to protects users from man-in-the-middle attacks and eavesdroppers on HTTPS pages. Options panel created for Web Developer Toolbox. Improved about: Simplified interface for notifications of plugin installation. Users can now switch to a new search provider across the entire browser.

CSP policies using the standard syntax and semantics will now be enforced. Replaced fixed-ratio audio resampler in webrtc. Write more accessible pages on touch interfaces with new ARIA role for key buttons. Social share functionality. Added unprefixed requestAnimationFrame. Implemented a global browser console. Dropped blink effect from text-decoration: New feature in toolbox: Network Monitor. Implemented Close tabs to the right. Ability to tear-off chat windows to view separately by simply dragging them out. Accessibility related improvements on using pinned tabs.

Removed support for Revocation Lists feature. Performance improvements on New Tab Page loads. Major SVG rendering improvements around Image tiling and scaling. Improved and unified Browser console for enhanced debugging experience, replacing existing Error console. Removed support for sherlock files that are loaded from application or profile directory. Updated Mozilla to NSS 3. Fixed an issue where some UI strings in Firefox The find bar is no longer shared between tabs.

Clear your web browser's cache, cookies, and history

If away from Firefox for months, you now will be offered the option to migrate another browser's history and settings. Resetting Firefox no longer clears your browsing session. CSS3 background-attachment: Many new ES6 functions implemented. Fixed blank or missing page thumbnails when opening a new tab. Password manager now supports script-generated password fields. Updates can now be performed by Windows users without write permissions to Firefox install directory requires Mozilla Maintenance Service.

Support for H. CSP implementation now supports multiple policies, including the case of both an enforced and Report-Only policy, per the specification. ToFloat32 takes a JavaScript value and converts it to a Float32, whenever possible. There is no longer a prompt when websites use appcache. Support for the CSS image orientation property. IndexedDB can now be used as a "optimistic" storage area so it doesn't require any prompts and data is stored in a pool with LRU eviction policy, in short temporary storage. Improved page load times due to no longer decoding images that are not visible.

Off-cycle stability mobile release. Most affected are: In some cases, the clip set on the page doesn't update when the addressbar hides. Invalid position: You can now run more than one service at a time with Firefox SocialAPI, allowing you to receive notifications, chat and more from multiple integrated services.

Enabled TLS 1. Added support for SPDY 3. Ability to reset style sheets using all: You can now choose to deobfuscate javascript in the debugger. Added support for scrolled fieldsets. Implemented allow-popups directive for iframe sandbox, enabling increased security. CSS cursor keywords -moz-grab and -moz-grabbing have been unprefixed. Added support for ES6 generators in SpiderMonkey. Implemented support for mathematical function Math. Dashed line support on Canvas. Off-cycle stability release. JavaScript math correctness issue.

Notification Center support for web notifications. Support for Opus in WebM. Support for MathML 2. Background thread hang reporting. Support for multi-line flexbox in layout. Android Off-cycle stability mobile update. Mobile-only security fix for file: A new menu sits in the right hand corner of Firefox and includes popular browser controls. New tabs provide an overall smoother look and fade into the background when not active.

An interactive onboarding tour to guide users through the new Firefox changes. Added the ability to set up Firefox Sync by creating a Firefox account. Gamepad API finalized and enabled. Malay [ma] locale added. Clicking on a W3C Web Notification will switch to the originating tab. Console object available in web workers. Promises enabled by default. SharedWorker enabled by default. Add-on bar has been removed, content moved to navigation bar. No longer possible to move tabs from the top of the browser without an add-on.

An issue with pdf. Tabs not visible with dark themes under Windows 8. Session Restore failed with a corrupted sessionstore. Seer disabled by default.