Firefox Doesn't Work on Vista
The new release of Firefox, version 126.96.36.199, which was released December 19th, still has problems running on Vista. The biggest problem is that it cannot be set as the default browser. It almost seems as if Microsoft purposefully changed things to make it more difficult for Firefox. According to W3Schools, Firefox had nearly a 30% market share in November, number two after IE 6's 50% share.