Changes

Since the release of FireFox Firefox 3 there have been dramatic improvements made to the networking code to make it a lot faster. However, there have been some problems introduced with this. Many people have noticed that FireFox Firefox 3 will terminate connections early and these connections will timeout. The problem is further exacerbated by FireFox Firefox 3 using persistent connections. In this situation your browser will be unable to make any new connections, either to that site, or to all sites depending on how many "frozen" connections you have.

This problem has been found on all sorts of installations of Windows XP+ with various extensions and no extensions. When FireFox Firefox 3 would lock up, other network applications would still be functioning fine.