Firefox 41.0

Firefox

Mozilla Firefox is a fast, full-featured Web browser. It offers great security, privacy, and protection against viruses, spyware, malware, and it can also easily block pop-up windows. The key features that have made Mozilla Firefox so popular are the simple and effective UI, browser speed and strong security capabilities. Firefox is built on top of the powerful new Gecko platform, resulting in a safer, easier to use and more personal product.

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.

What's new in Firefox 41.0:

Enhance IME support on Windows (Vista +) using TSF (Text Services Framework)
Ability to set a profile picture for your Firefox Account
Firefox Hello now includes instant messaging
SVG images can be used as favicons

Changed

Type 2 Add-ons (Extensions) that have not been signed by Mozilla will be disabled by default. Read more about Add-on signing in Firefox
WebRTC now requires perfect forward secrecy
WARP is disabled on Windows 7
Memory overhead of AdBlock Plus has been greatly reduced
Updates to image decoding process
Support for running animations of 'transform' and 'opacity' on the compositor thread

HTML5

MessageChannel and MessagePort API enabled by default
Added support for the transform-origin property on SVG elements
CSS Font Loading API enabled by default
Navigator.onLine now varies with actual internet connectivity (Windows and Mac OS X only)
Copy/Cut Web content from JavaScript to the OS clipboard with document.execCommand("cut"/"copy")
Implemented Cache API for querying named caches that are accessible Window, Worker, and ServiceWorker

Developer

Removed support for binary XPCOM components in extensions, use addon SDK "system/child_process" pipe mechanism for native binaries instead
Network requests can be exported in HAR format
Quickly add new CSS rule with New Rule button in the Inspector
Screenshot a node or element from markup view with the Screenshot Node context menu item
Copy element CSS rule declarations with the Copy Rule Declaration context menu item in the Inspector
Pseudo-Class panel in the Inspector
View HTML source in a tab

Fixed