Download Mozilla Firefox 55.0 x64 MSI.
- No desktop shortcut;
- English localization;
- No Updater (no Mozilla maintenance service);
- Upgradable in the future. (a past release)
New
- Launched Windows support for WebVR, bringing immersive experiences to the web. See examples and try working demos at Mozilla VR.
- Added options that let users optimize recent performance improvements
- Setting to enable Hardware VP9 acceleration on Windows 10 Anniversary Edition for better battery life and lower CPU usage while watching videos
- Setting to modify the number of concurrent content processes for faster page loading and more responsive tab switching
- The simplified installation process with a streamlined Windows stub installer
- Firefox for Windows 64-bit is now installed by default on 64-bit systems with at least 2GB of RAM
- Full installers with advanced installation options are still available
- Improved address bar functionality
- Search with any installed one-click search engine directly from the address bar
- Search suggestions appear by default
- When entering a hostname (like pinterest.com) in the URL bar, Firefox resolves to the secure version of the site (https://www.pinterest.com) instead of the insecure version (http://www.pinterest.com) when possible
- Updated Sidebar for bookmarks, history, and synced tabs so it can appear at the right edge of the window as well as the left
- Added support for stereo microphones with WebRTC
- Pages can be simplified before printing from within Print Preview
- Updated Firefox for OSX and macOS to allow users to assign custom keyboard shortcuts to Firefox menu items via System Preferences
- Browsing sessions with a high number of tabs are now restored in an instant
- Make screenshots of webpages, and save them locally or upload them to the cloud. This feature will undergo A/B testing and will not be visible for some users.
- Added Belarusian (be) locale
Fixed
- Various security fixes
Changed
- Made the Adobe Flash plugin click-to-activate by default and allowed only on http:// and https:// URL schemes. (This change will not be visible to all users immediately.)
- Firefox does not support downgrades, even though this may have worked in past versions. Users who install Firefox 55+ and later downgrade to an earlier version may experience issues with Firefox.
- Modernized application update UI to be less intrusive and more aligned with the rest of the browser. Only users who have not restarted their browser 8 days after downloading an update or users who opted out of automatic updates will see this change.
Developer
- Sites that don’t use SSL can no longer access Geolocation APIs to determine a user’s physical location
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