Firefox 55 für Desktop ist ab sofort erhältlich

Mozilla hat die Version 55.0 von Firefox für PC, Mac und Linux für den persönlichen Gebrauch veröffentlicht. Mit diesem Update unterstützt Firefox 55 als erster Desktop-Browser die neue WebVR-Schnittstelle. Dadurch können Nutzer direkt im Browser VR-Inhalte anschauen. Zudem bietet Firefox 55 auch ein Screenshot-Tool. Darüber hinaus umfasst das Update auch weitere Neuerungen, Verbesserungen, Fehlerbehebungen sowie Leistungsverbesserungen. Außerdem schließt Mozilla auch Sicherheitslücken. Nutzer, die eine ältere Version installiert haben, erhalten das Update automatisch. Wer dies nicht möchte, kann das Update auch manuell herunterladen.


Download -> Firefox für Windows, macOS und Linux herunterladen

Das Update für Firefox für Windows, macOS und Linux kann ab sofort geladen werden:

Download -> Firefox 55.0 für Windows herunterladen
Download -> Firefox 55.0 für Windows 64-bit herunterladen
Download -> Firefox 55.0 für Mac OS X herunterladen
Download -> Firefox 55.0 für Linux herunterladen
Download -> Firefox 55.0 für Linux 64-bit herunterladen
Release Notes -> First offered to Release channel users on August 8, 2017

Check out what’s new and known issues for this version of Firefox below.

Today’s release brings innovative functionality, improvements to core browser performance, and more proof that we’re committed to making Firefox better than ever. New features include support for WebVR, making Firefox the first Windows desktop browser to support VR experiences. Performance changes include significantly faster startup times when restoring lots of tabs and settings that let users take greater control of our new multi-process architecture. We’ve also upgraded the address bar to make finding what you want easier, with search suggestions and the integration of our one-click search feature, and safer, by prioritizing the secure – https – version of sites when possible.


  • Launched Windows support for WebVR, bringing immersive experiences to the web.
  • 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



  • 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.
  • Made the Adobe Flash plugin click-to-activate by default and allowed only on http:// and https:// URL schemes.
  • 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.


  • Sites that don’t use SSL can no longer access Geolocation APIs to determine a user’s physical location

Häufig gestellte Fragen nach einer Aktualisierung von Firefox

Die Entwickler der Mozilla-Foundation stellen Firefox für Windows, macOS und Linux in mehreren Sprachen zur Verfügung. Bitte beachtet, dass die Installation von Firefox eure existierende Firefox Version überschreibt. Weder eure Lesezeichen noch die Chronik gehen dabei verloren. Jedoch könnten einige Erweiterungen und andere Add-Ons nicht mehr funktionieren, bis entsprechende Aktualisierungen oder Updates zur Verfügung stehen.

via Mozilla