User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20040913 Firefox/0.10.1 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20040913 Firefox/0.10.1 The URL [bugmenot.com/view.php?url=http%3A%2F%2Fpeople.aol.com%2Fpeople%2Farticles%2F0%2C19736%2C733875%2C00.html] makes the current firefox tab's disappear (crash?!). If have only one tab open, Firefox itself dies. The crash handler does _not_ appear. The only notification of this problem is that Firefox disappears instantly. Reproducible: Sometimes Steps to Reproduce: 1. Past the URL bugmenot.com/view.php?url=http%3A%2F%2Fpeople.aol.com%2Fpeople%2Farticles%2F0%2C19736%2C733875%2C00.html into the address bar. Press enter. Actual Results: The tab disappears. If there is only one tab open, Firefox disappears. Expected Results: The page should have been displayed. Default theme, some extensions, notably, an old version of the Bugmenot extension which is completely disfunctional and never shows up anywhere else in Firefox except in the "extensions" dialog box.
WFM on the latest Firefox. From the symptoms it sounds like the page is doing a window.close() but I can't find any evidence of that in the page source of the link you give -- I don't see any scripts at all in fact. That would be a bug, but not a security hole. Please try the latest Firefox, there were bugs fixed recently dealing with window.close() in tabs.