Google Desktop Supports Mozilla, Firefox, Thunderbird and Netscape ( from MozillaZine )

Google Desktop Supports Mozilla, Firefox, Thunderbird and Netscape - MozillaZine Talkback: Search giant Google has released the first non-beta version of its Google Desktop application, which now includes support for several Mozilla-based applications. The desktop search tool lets you find Web pages you've visited with the Mozilla Application Suite, Mozilla Firefox and Netscape 7 and locates emails received with Mozilla Mail & Newsgroups, Mozilla Thunderbird and Netscape 7 Mail & Newsgroups.
Although I haven't installed it yet, all of the things Google has offered so far are quite usefull and working great, so consider giving it a try.