Recently Google announced that with their Adsense program you are able to make money, albeit $1 per referral, by switching folks over to Firefox. The Firefox version you get is bundled with the official Google Toolbar, but that's not really a bad thing.
Google promoting Firefox is a great leap for the browser, and the standards development community. Hopefully it will help spread Firefox more widely. However, I wonder why Google are doing this.
However, I wonder why Google are doing this... Ben Goodger, the lead developer on Firefox, changed from the Mozilla Foundation for the payroll of Google at the start of 2005. Google also acquired some (four) developers who worked on Microsoft's Internet Explorer. Google have even registered gbrowser.com, but there is no site at present. There are plenty of rumours about the gbrowser too. I have no doubt that we'll see a browser by Google by the end of 2006.
It's highly likely that the browser will run on the Gecko-based engine (behind Mozilla products), so why do they feel the need to push Firefox. Maybe, like a lot of great products which have been released recently, Google are planning on buying out Firefox, like they and Yahoo! have done in the past.
If you want to promote Firefox or want some reasons to switch, check out these sites:
Side note, Firefox 1.0 is one year (and one day) old. (I missed the boat by a day, oops!)