Mozilla Firefox 55.0.3

Une nouvelle version du navigateur Firefox vient de sortir. Contrairement à la version précédente, cette version 55.0 apporte une avalanche de nouveautés à commencer par une restauration de sessions (en cas de crash) beaucoup plus rapide si vous aviez des dizaines d'onglets ouverts, une nouvelle page des Préférences/Options, la possibilité de faire des captures d'écrans d'une partie ou d'une page entière, l'introduction de WebVR, etc...

Un seul bémol, il faudra bien faire attention de ne plus repasser aux versions précédentes de Firefox une fois la mise à jour faite vers cette version 55.0. Mozilla ayant introduit des changements (pour les futures versions) dans les profils qui risquerait de rendre inutilisable le navigateur.

Voici la liste complète des modifications par rapport à la version précédente :

Nouveautés de Firefox 55.0.3 (25/08/2017)


  • Fix file uploads to some websites, including YouTube (bug 1383518)
  • Fix an issue with addons when using a path containing non-ascii characters (bug 1389160)
Consulter les notes de version de Mozilla Firefox 55.0.3

Nouveautés de Firefox 55.0.2 (16/08/2017)


  • Fix a regression with the popup menu (Bug 1388682)
  • Fix performance regressions with WebExtension (Bugs 1386937 & 1389381)
  • Fix an issue with new installation notification for sideload add-ons (Bug 1372448)
  • Fix a potential issue when the username had some specific characters in the path (Bug 1388584)
Consulter les notes de version de Mozilla Firefox 55.0.2

Nouveautés de Firefox 55.0.1 (10/08/2017)


  • Fix a regression the tab restoration process (bug 1388160)
  • Fix a problem causing What's new pages not to be displayed (bug 1386224)
  • Fix a rendering issue with some PKCS#11 libraries (bug 1388370)
  • Disable the predictor prefetch (bug 1388160)
Consulter les notes de version de Mozilla Firefox 55.0.1

Nouveautés de Firefox 55.0 (07/08/2017)


  • 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
  • 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 in the URL bar, Firefox resolves to the secure version of the site ( instead of the insecure version ( 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
  • Simplified printing from Reader Mode
  • 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



  • 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. For more information see the Firefox plugin roadmap)
  • 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.


  • Sites that don’t use SSL can no longer access Geolocation APIs to determine a user’s physical location
Consulter les notes de version de Mozilla Firefox 55.0

Télécharger Mozilla Firefox 55.0.3

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