I am having problems with pop ups on some sites. I do not have pop ups blocked and I do have javascript enabled. I am using Firefox 6.0.2 on Windows XP 32-bit (I first noticed the problem with an older version of Firefox but upgrading didn't help). To see an example of the problem, visit one of the StackExchange sites eg Stackoverflow.com (you might need to create an account or log in with Open ID). If you click on a question you should see some options underneath the question text: link|edit|close|flag (You may not see edit or close if you are a new user as I think these require some "reputation" to be enabled). Clicking on "close" or "flag" is supposed to pop up a dialog asking for the close / flag reason to be selected from radio buttons. This works fine for me in Chrome or if I start Firefox in Safe Mode, but not if I start Firefox normally (even if I disable all plug ins and extensions manually). I asked about this on Meta Stack Overflow (my question is here: http://meta.stackoverflow.com/questions/106405/close-link-doesnt-work-for-me ) but they were unable to help beyond "it's probably one of your browser settings". I've looked through all the settings under Tools -> Options and can't see anything odd. I actually have a similar issue on an internal work web server which displays pop ups OK but they have no text in them. I can't point you at this as it's inside our firewall but I am hopeful that the resolution to the first issue will also resolve the second :-)