What is it?
Firefox 4 is Mozilla's fifth major browser release (including v3.6) that is designed to help Mozilla catch up with an increasingly fast development pace in the browser segment. While it is designed to compete with the current generation of rival browsers, especially IE9 and Chrome 10, it is Mozilla's last browser in an extended development cycle. The browser was first announced to be in development in May of last year, while the actual development of core features for the browser, including GPU acceleration support, has lasted more than a year and began with version 3.7. Mozilla released 12 beta versions between July 2010 and February 2011 and two release candidates earlier this month. Future Firefox versions will be released every 16 months (as final versions). Like Google, Mozilla will have at least three different browser versions in development at any given time. Firefox 5 is due to be released in the week of June 29 of this year.
2. What is new?
3. So, how fast is it?
4. How does the hardware acceleration support differ from IE9?
There is an ongoing argument between Mozilla and Microsoft who really offers the most complete hardware acceleration. While Microsoft claims that Firefox and Chrome do not accelerate all levels that are accessible in Windows 7, Mozilla claims that Microsoft does not address the entire HTML5 platform and especially not all operating systems - as IE9 only supports Windows 7 as well as Windows Vista SP2.
Firefox accelerates content in the following way (source: Mozilla Hacks):
The argument may soon change, however, as Google is preparing acceleration support also for plug-ins and Opera is promising full hardware acceleration for Windows XP in Opera 11.50.
5. Who should download Firefox 4?
It is still a lean, but much more capable browser. However, you may want to wait you’re your upgrade, if you depend on plug-ins: Add-ons for Firefox 3.x are not compatible with Firefox 4. If you don't use plug-ins, it’s a no-brainer to step up from version 3.x to 4.0. Keep in mind that there will be an update to version 4.1 or 4.0.1 within two or three weeks that will fix a few minor issues in the code.
6. Firefox 4, Chrome 10, or IE9?
7. Where do I download Firefox 4?
Windows : http://www.tomsguide.com/us/download/Mozilla-Firefox,0301-7374.html
Mac : http://www.tomsguide.com/us/download/Mozilla-Firefox,0301-7374-27688.html
Linux : http://www.tomsguide.com/us/download/Mozilla-Firefox,0301-7374-27690.html
Linux x64 : http://www.tomsguide.com/us/download/Mozilla-Firefox,0301-7374-27692.html
8. What about the update?
Mozilla will update your Firefox to version 4.0 through its usual update process. You can also simply download Firefox 4.0 and existing 3.x versions will be updated to the new 4.0.
9. Where can I find the menu bar?
If you are upgrading from Firefox 3.x, it is most likely that you may miss the menu bar. It has been removed by default to give web content more room. However, if you want to enable the menu bar again, you can find it by clicking the orange Firefox button (top left corner), and selecting Menu Bar from the Options menu. keep in mind that panorama is one of the key features of the new Firefox interface, which can be access via a small arrow button on the right side of the top toolbar.
10. I am ready to go. Show me HTML5!
Accelerated, rich HTML5 content is what makes the new generation of browsers stand out. Especially Microsoft and Mozilla have been publishing lots of demos to showcase the new capabilities. You can find Microsoft's demo page here and Mozilla's demo page here. Mozilla has also launched a first version of its Open Web App Store platform with new applications that are worth trying