User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9) Gecko/2008052906 Firefox/3.0 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9) Gecko/2008052906 Firefox/3.0 This is a Chinese website. It only support IE for the online account verification. I remembered the FireFox beta 1 can display the web page. But the FF3 only display the HTML source code. Reproducible: Always Steps to Reproduce: 1. 2. 3.
I just tried a RC version (Created on 05/29). It is OK.
The last Release Candidate (RC3) *is* the final version. Look at the build-date : they're both May 29th. The problem is due to a misconfiguration of the webserver, which uses the text/plain MIME-type instead of text/html (Firefox respects that setting even if it's incorrect, IE ignores it). The reason that you saw it with one version, and not with the other one, might be due to load balancing : maybe there' 1 webserver out of a series that is misconfigured. Or maybe it was fixed in the mean time. It works for me with Firefox 3.0 final on Windows XP.
They seem to have fixed this. I also saw the source before due to text/plain. But now I see the page.
If you still see this use shift+reload or clear the cache