
De Mozilla Foundation heeft de eerste bètarelease vrijgegeven van versie 4.0 van zijn webbrowser Firefox. In versie 4 is onder andere het uiterlijk onder handen genomen, waardoor deze sneller kan worden gebruikt. Zo zijn de tabs nu aan de bovenkant geplaatst en is er onder Windows Vista en 7 een Firefox-knop, zoals bijvoorbeeld ook voor Opera. Verder is er volledige ondersteuning voor WebM, WebGL en multitouch-displays, en is de ondersteuning voor html5 en css3 verbeterd. Hieronder is een lijst met de belangrijkste verbeteringen te vinden.
What’s New in Firefox 4 Beta (revision 1)
- Tabs are now on top by default on Windows only - OSX and Linux will be changing when the theme has been modified to support the change.
- On Windows Vista and Windows 7 the menu bar has been replaced with the Firefox button.
- 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 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 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 but disabled by default at this time.
- 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.
- An experimental Direct2D rendering backend is available on Windows, turned off by default.
- Web developers can use Websockets for a low complexity, low latency, bidirectional communications API.
- 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.
Developers can find out about all the changes and new features at the Mozilla Developer Center.
De volgende downloads zijn beschikbaar:
Mozilla Firefox 4.0 bèta 1 voor Windows (Engels)
Mozilla Firefox 4.0 bèta 1 voor Linux (Engels)
Mozilla Firefox 4.0 bèta 1 voor Mac OS X (Engels)

Mozilla Firefox 4.0 bèta screenshot, klik op de afbeelding voor een grotere versie.
/u/346051/Avater51x51.png?f=community)
:strip_icc():strip_exif()/u/213293/crop5ccc38fc9b330_cropped.jpeg?f=community)
/u/189748/1984-14997.png?f=community)
:strip_icc():strip_exif()/u/12330/dnangel_70.jpg?f=community)
:strip_icc():strip_exif()/u/140051/BSOD.jpg?f=community)
:strip_exif()/u/179734/crop5a0ab1438ca13_cropped.gif?f=community)
:strip_exif()/u/51674/rommel_beard.gif?f=community)
:strip_icc():strip_exif()/u/289656/crop692432b4a11c2_cropped.jpg?f=community)
:strip_exif()/u/58200/smiley_n.gif?f=community)
:strip_icc():strip_exif()/u/29008/PaulMuadDib.jpg?f=community)
:strip_icc():strip_exif()/u/150799/ice.jpg?f=community)
/u/152942/crop687206d7bca78.png?f=community)
:strip_exif()/u/130235/balance.gif?f=community)
:strip_icc():strip_exif()/u/78891/W-Seawolf.jpg?f=community)
:strip_icc():strip_exif()/u/259016/blablabla.jpg?f=community)
/u/1/femme.png?f=community)
/u/201305/Pig.png?f=community)
:strip_icc():strip_exif()/u/131708/crop57b1bb5db3599_cropped.jpeg?f=community)
:strip_icc():strip_exif()/u/299039/dv3.jpg?f=community)
/u/7928/ava-misc-dp0.png?f=community)
:strip_icc():strip_exif()/u/305019/crop636fec657ac8d_cropped.jpg?f=community)