The Fedora Project has recently announced that Firefox 38 has been included to te default repositories of Fedora 21 and Fedora 22 (which should be released on the 26th of May).
Firefox 38 has been recently released by Mozilla and brings new Tab-based Preferences menus (already implemented on the Beta channel), some special changes for developers, a bunch of HTML5 improvements, the autocomplete=off feature is no longer supported for username/password fields, support for high DPI screens and some other changes.
The full changelog can be found below:
- New: New tab-based preferences
- New: Ruby annotation support
- New: Share the active tab or window in a Hello conversation – enabled for first half of the beta cycle
- New: Keep track of articles and blog posts with the Reading List – enabled for the first half of the beta cycle
- New: Base for the next ESR release.
- Changed: autocomplete=off is no longer supported for username/password fields
- Changed: RegExp.prototype.source now returns “(?:)” instead of the empty string for empty regular expressions
- Changed: Page load times improved by speculative connection warmup
- HTML5: WebSocket now available in Web Workers
- HTML5: Implemented srcset attribute and element for responsive images
- HTML5: Implemented DOM3 Events KeyboardEvent.code
- HTML5: BroadcastChannel API implemented
- HTML5: Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback HTML5: Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME
- 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
Since it has been added to the default repositories of Fedora 22 and Fedora 21, you only need to refresh the repository index and install the firefox package:
$ sudo yum update
$ sudo yum install firefox
Next, to enable the high DPI mode in Firefox, go to about:config and set the layout.css.devPixelsPerPx value to 2. For more information, see this link.