Mozilla Firefox 49.0.2

Nouvelle version fraîchement sortie pour Mozilla Firefox. Pour la v49.0, le navigateur s'améliore au niveau des performances : réactivité sur MacOS et performances vidéo pour les PC sans accélération matérielle. D'ailleurs, la navigateur demande la présence des instructions SSE2 sur Windows, ce qui devrait reléguer les PC de plus de 15 ans à la version précédente.

Le mode lecture peut désormais lire à haute voix, et son mode d'impression est amélioré. En ce qui concerne la catégorie sociale, Firefox Hello est abandonné.

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


  • Asynchronous rendering of the Flash plugins is now enabled by default. This should improve performance and reduce crashes for sites that use the Flash plugin. (Bug 1307108)


  • Change D3D9 default fallback preference to prevent graphical artifacts (Bug 1306465)
  • Network issue prevents some users from seeing the Firefox UI on startup (Bug 1305436)
  • Web compatibility issue with file uploads (Bug 1306472)
  • Various security fixes
  • Web compatibility issue with Array.prototype.values (Bug 1299593)


  • Diagnostic information on timing for tab switching (Bug 1304113)

  • Fix a Canvas filters graphics issue affecting HTML5 apps (Bug 1304539)
Consulter les notes de version de Mozilla Firefox 49.0.2


  • Mitigate a startup crash issue caused by Websense (Windows only) (Bug 1304783)
Consulter les notes de version de Mozilla Firefox 49.0.1


  • Updated Firefox Login Manager to allow HTTPS pages to use saved HTTP logins. It’s one more way Firefox is supporting Let’s Encrypt and helping users transition to a more secure web.
  • Added features to Reader Mode that make it easier on the eyes and the ears
    • Controls that allow users to adjust the width and line spacing of text
    • Narrate, which reads the content of a page out loud
  • Improved video performance for users on systems that support SSSE3 without hardware acceleration
  • Added context menu controls to HTML5 audio and video that let users loops files or play files at 1.25x speed
  • Enhancements for Mac users
    • Improved performance on OS X systems without hardware acceleration
    • Improved appearance of anti-aliased OS X fonts
  • Improvements in about:memory reports for tracking font memory usage
  • Improve performance on Windows systems without hardware acceleration


  • Fixed an issue that prevented users from updating Firefox for Mac unless they originally installed Firefox. Now, those users as well as any user with administrative credentials can update Firefox.
  • Various security fixes



Consulter les notes de version de Mozilla Firefox 49.0

Télécharger Mozilla Firefox 49.0.2

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