Firefox nightlies now support AAC, MP3 and H.264 by default in Windows

Mozilla hasn't been the most eager supporter of commercialized media formats; it flipped the H.264 switch in Firefox's HTML5 support last year only when it was clear WebM wasn't taking off. Still, those who regularly test the company's latest work will be glad to hear that support for AAC, MP3 and H.264-based MP4 is now enabled by default in Firefox nightly builds. Provided you're using Windows 7 or newer, it's no longer necessary to change settings to play relatively common HTML5 audio and video formats. Web users wanting the extra support in a finished version of the browser will need to wait for a completed Firefox 22, which is expected to launch in late June; risk takers just need to check out the source links.