Firefox 4.0 Release Candidate 1 steht zum Download bereit

Firefox 4.0 Release Candidate 1 steht zum Download bereit

Die Entwickler der Mozilla-Foundation haben den ersten Release Candidate von Firefox 4.0 fertiggestellt und zum Download freigegeben. Firefox 4.0 Release Candidate 1 ist ab sofort auf der Herstellerseite erhältlich, darunter auch auf Deutsch, und zwar für Windows, Mac OS X und Linux.

Die Entwickler haben gegenüber Firefox 4.0 Beta 12 sage und schreibe 673 Fehler behoben. Die vollständige Änderungsliste findet ihr hier -> Firefox 4 RC 1 Fixes. Die aktuellen Release Notes geben euch einen Überblick über alle Neuerungen und Verbesserungen in Firefox 4.0 Release Candidate 1.

Ein Changelog liegt noch nicht vor, wird später nachgereicht...

Firefox 4.0 RC1 für Windows, Mac OS X und Linux

Firefox 4 RC is based on the Gecko 2.0 Web platform. Please read below for more detailed information about what's new in this version of the beta release, as well as the known issues. This Firefox 4 RC is considered to be stable and safe to use for daily web browsing, though the features and content may change before the final product release. At this time many Add-ons may not yet have been tested by their authors to ensure that they are compatible with this release.

Mozilla Firefox 4.0 Release Candidate 1 for Windows herunterladen:

Mozilla Firefox 4.0 Release Candidate 1 for Mac OS X herunterladen:

Mozilla Firefox 4.0 Release Candidate 1 for Linux herunterladen:

Was ist neu in Firefox 4.0 Release Candidate 1

As well as these features from previous Firefox 4 Betas:

  • Firefox 4 RC is available in 79 languages.
  • Support for the proposed Do Not Track ("DNT") header.
  • Connection status messages are now shown in a small overlay.
  • WebGL is enabled on all platforms, but, like for other hardware acceleration features, many buggy drivers or driver versions are blocked.
  • The default homepage design has been refreshed.
  • Firefox no longer switches into offline mode automatically.
  • Overhaul of the bookmarks and history code, enabling faster bookmarking and startup performance.
  • Per-compartment garbage collection is now enabled, reducing work done during complex animations.
  • The Firefox Sync setup experience has been greatly improved across desktop and mobile devices.
  • Additional polish for the Firefox Add-ons Manager.
  • Uses JägerMonkey, a new, faster JavaScript engine.
  • Certain rendering operations are now hardware-accelerated using Direct3D 9 on Windows XP, Direct3D 10 on Windows Vista and 7, and OpenGL on Mac OS X.
  • Improved web typography using OpenType with support for ligatures, kerning and font variants.
  • HTML5 Forms API makes web based forms easier to implement and validate.
  • Support for the new proposed Audio Data API.
  • Direct2D Hardware Acceleration is now on by default for Windows 7 users.
  • Firefox button has a new look for Windows Vista and Windows 7 users.
  • Support for HSTS security protocol allowing sites to insist that they only be loaded over SSL.
  • Firefox Sync is now included by default.
  • A new feature gives users a visual overview of all open tabs, allowing them to be sorted and grouped.
  • An experimental API is included to provide more efficient Javascript animations.
  • Firefox now supports the HTML5 video "buffered" property.
  • Tabs are now on top by default on Windows, Mac OS X, and Linux.
  • You can turn any tab into an "App Tab" by right-clicking on it and selecting "Make into App Tab" from the context menu.
  • Web developers can animate content using CSS Transitions.
  • Responsiveness and scrolling improvements from the new retained layers layout system.
  • JavaScript speed improvements due to engine optimizations.
  • Changes to how XPCOM components are registered in order to help startup time and process separation.
  • You can search for and switch to already open tabs in the Smart Location Bar.
  • New Addons Manager and extension management API (UI will be changed before final release).
  • Significant API improvements are available for JS-ctypes, a foreign function interface for extensions.
  • The stop and reload buttons have been merged into a single button on Windows, Mac OS X, and Linux.
  • The Bookmarks Toolbar has been replaced with a Bookmarks Button by default (you can switch it back if you'd like).
  • Crash protection for Windows, Linux, and Mac OS X when there is a crash in the Adobe Flash, Apple Quicktime or Microsoft Silverlight plugins.
  • CSS Transitions are partially supported.
  • Full WebGL support is included.
  • Core Animation rendering model for plugins on Mac OS X. Plugins which also support this rendering model can now draw faster and more efficiently.
  • Native support for the HD HTML5 WebM video format.
  • Web developers can update the URL field without reloading the page using HTML History APIs.
  • More responsive page rendering using lazy frame construction.
  • Link history lookup is done asynchronously to provide better responsiveness during pageload.
  • CSS :visited selectors have been changed to block websites from being able to check a user's browsing history.
  • New HTML5 parser.
  • Support for more HTML5 form controls.
  • Web authors can now get touch events from Firefox users on Windows 7 machines.
  • A new way of representing values in JavaScript that allows Firefox to execute heavy, numeric code (used for things like graphics and animations) more efficiently.

Developers can find out about all the changes and new features at the Mozilla Developer Center.


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