Download Mozilla Firefox 19.0 Beta

As we are used to from Mozilla, the first beta release of the next version has already appeared shortly after the release of a stable version of the Firefox web browser. Version 19, which should be released on February 19th, will include a built-in PDF reader and the browser will offer to set the default search provider in the awsome bar, if it has been modified by another program . Furthermore, the browser starts up faster and correctly indicates that it is running in private mode, if the private flag is passed. Below is the provisionally incomplete overview of the improvements that we can expect in version 19.

New

• Built-in PDF viewer
• Firefox will offer to reset the Awesomebar search provider, if it has been changed by third-party software or through about:config

Changed

• Canvas elements can export their content as an image blob using canvas.toBlob()
• Startup performance improvements (bugs 715402 and 756313)

Developer

• Debugger now supports pausing on exceptions and hiding non-enumerable properties
• Remote Web Console is available for connecting to Firefox on Android or Firefox OS (experimental, set devtools.debugger.remote-enabled to true)
• There is now a Browser Debugger available for add-on and browser developers (experimental, set devtools.chrome.enabled to true)
• Web Console CSS links now open in the Style Editor

HTML5

• C.S.S @page is now supported
• C.S.S viewport percentage length units implemented (vh, vw, vmin and vmax)
• CSS text-transform now supports full width

Fixed

• Starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode (802274)

Known Issues

• Certain valid WebGL drawing operations are incorrectly rejected, leaving incomplete rendering in affected pages (see 825205)
• If you try to start Firefox using a locked profile, it will crash (see 573369)
• For some users, scrolling in the main GMail window will be slower than usual (see 579260)
• Windows: The use of Microsoft’s System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
• Plugins stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode (see 825734)

The following downloads are available:
Mozilla Firefox 19.0 beta for Windows (English)
Mozilla Firefox 19.0 beta for Linux (English)
Mozilla Firefox 19.0 beta for OS X (English)
Mozilla Firefox 19.0 Beta for Windows (English)
Mozilla Firefox 19.0 Beta for Linux (English)
Mozilla Firefox 19.0 Beta for OS X (English)
Mozilla Firefox 19.0 beta for Windows (Frisian)
Mozilla Firefox 19.0 beta for Linux (Frisian)
Mozilla Firefox 19.0 beta for OS X (Frisian)