Firefox 38.0

Firefox

Mozilla Firefox is a fast, full-featured Web browser. Firefox includes pop-up blocking, tab-browsing, integrated Google search, simplified privacy controls, a streamlined browser window that shows you more of the page than any other browser and a number of additional features that work with you to help you get the most out of your time online.

The Web is all about innovation, and Firefox sets the pace with dozens of new features to deliver a faster, more secure and customizable Web browsing experience for all.

User Experience. The enhancements to Firefox provide the best possible browsing experience on the Web. The new Firefox smart location bar, affectionately known as the "Awesome Bar," learns as people use it, adapting to user preferences and offering better fitting matches over time.

Performance. Firefox is built on top of the powerful new Gecko platform, resulting in a safer, easier to use and more personal product.

Security. Firefox raises the bar for security. The new malware and phishing protection helps protect from viruses, worms, trojans and spyware to keep people safe on the Web.

Customization. Everyone uses the Web differently, and Firefox lets users customize their browser with more than 5,000 add-ons.

What’s new in Firefox 38.0:

New - New tab-based preferences
New - Ruby annotation support
New - Base for the next ESR release.
Changed - autocomplete=off is no longer supported for username/password fields
Changed - URL parser avoids doing percent encoding when setting the Fragment part of the URL, and percent decoding when getting the Fragment in line with the URL spec
Changed - RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions
Changed - Improved page load times via speculative connection warmup
HTML5 - WebSocket now available in Web Workers
HTML5 - BroadcastChannel API implemented
HTML5 - Implemented srcset attribute and element for responsive images
HTML5 - Implemented DOM3 Events KeyboardEvent.code
HTML5 - Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube
HTML5 - Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback (Windows Vista or later only)
HTML5 - Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME (Windows Vista or later only)
Developer - Optimized-out variables are now visible in Debugger UI
Developer - XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests
Developer - WebRTC now has multistream and renegotiation support
Developer - copy command added to console
Various security fixes