Here is the release note for the latest release .
The latest version of Firefox has the following changes:
- Add-ons installed by third party programs are now disabled by default
- Added a one-time add-on selection dialog to manage previously installed add-ons
- Added Twitter to the search bar for select locales. Additional locale support will be added in the future
- Added a preference to load tabs on demand, improving start-up time when windows are restored
- Improved performance and memory handling when using <audio> and <video> elements
- Added CORS support for cross-domain textures in WebGL
- Added support for HTML5 context menus
- Added support for insertAdjacentHTML
- Improved CSS hyphen support for many languages
- Improved WebSocket support
- Fixed several stability issues
- Fixed several security issues
Download Firefox for Windows
