User Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:11.0) Gecko/20100101 Firefox/11.0 Build ID: 20120310010446 Steps to reproduce: I open two websites in different TABS. I do a file upload to site and work with "browse file" dialog In first tab; A popup window appears at a second tab in this time. Actual results: А tabs are frozen and I can't push "ok" button in popup dialog or "open/cancel" in "browse file" dialog or close tabs or browser. Expected results: Tabs should works independently.
Could you point out the specific sites used? So that we could attempt to reproduce?
Thanks. Confirming on latest Nightly: Mozilla/5.0 (X11; Linux i686; rv:15.0) Gecko/15.0 Firefox/15.0a1 20120527030515 1. Load http://fastpic.ru/ 2. In a new tab load http://orionty.ru/popup.html 3. Select browse in site 1 before the pop-up from site 2 is displayed. 4. Wait for the pop-up to be displayed Actual result: Can't exit Firefox or the Upload file dialog. (cancel or X button are unresponsive) Doesn't occur on Windows XP. On Mac, Firefox hangs after step 4. Tentatively moving to File Handling component. Also occurs in 4.0.1 so this is no recent regression.