Firefox 3.0 is definitely a major enhancement & competition to Internet Explorer. However, with that comes new bug/ broken functionality.

One such issue that has recently reported by many by employees. In corporate environment, where normally proxies are implemented to limit access to internet, Firefox3 fails to browse internet while a previous version (Firefox2) worked just okay!

It seems the [1] Proxy Auto-Config (.PAC) script doesn’t go well with Firefox3.0. Somehow, for reasons unknown to me, Firefox is not able to read the PAC scripts & thus get the proxy servers. An alternative to this, is to use proxy server names, if you know one.

Generally, if your compnay’s network department uses PAC scripts, you would not know the proxy server. There is a way though, to find proxy servers under the hood.

Solution- Pretty darn simple, I used [2] “TCP Monitor” tool to see which server my Internet Explorer connects. Once I found the proxy server, I used in the Network connection settings in Firefox3. This works for me, hope it does for you as well.