From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Q312461; .NET CLR 1.0.2914) BuildID: 2002052306 After installing the RC3 build ontop of the RC1 build using the installer from mozilla.org, no new windows will load after mozilla.exe has started. The only way to get them to load is to use the task manager to kill mozilla.exe and have the application start all over. This loads one browser window, but doesn't load any new ones. When I try to click Exit Mozilla from Quick Launch the mozilla.exe process persists (I don't know if this is supposed to happen, but it might help). Reproducible: Always Steps to Reproduce: Not sure if this works, but this is what I did 1. Installed Mozilla 1Rc1 2. Installed Lo-fi theme. Adjusted quite a few settings under pref. Changed bookmarks. Installed Java Plugin 3. Installed Mozilla 1Rc3. The bug now persists, despite reinstalling. The bug does not seem easily reproducible and I think the problem seems rather localized to specific systems.
"Installing on top of previously installed builds may cause problems." (see release notes). You should try to deinstall RC1 first and then to install RC3. Alternatively, it might be possible to install the RC3 in a new, empty directory. But I don´t know whether this may cause any problems in your situation now. So, just try to deinstall either version and have a new try with RC3.
and please uninstall all Third-Party Themes and/or delete all files in profile/chrome -> critical but no blocker
dupe of bug 135017 *** This bug has been marked as a duplicate of 135017 ***