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This article covers a number of fixes you can try if this is happens to you.

<!-- This article will be obsolete when bug 218257 is fixed. --> Firefox may repeatedly open new, empty tabs or windows after you click on a link, forcing you to close Firefox. The same untitled tabs or blank windows may open the next time you start Firefox if the previous session is restored. This usually happens because you chose Firefox as the program to always use for a particular action, such as opening a certain type of file or launching an application to send mail. {note}'''Note:''' [[Template:reset-fx]]{/note} __TOC__ = Start a new Firefox session = You may be forced to close Firefox if it is repeatedly opening multiple tabs or windows. Firefox includes a [[Restore previous session - Configure when Firefox shows your most recent tabs and windows|Session Restore]] feature that can restore your windows and tabs from the previous session after a crash or unexpected close. The same multiple tabs or windows may start opening when you next start Firefox, forcing you to close Firefox again. If you see a Restore Session ({for not fx57} "''Well, this is embarrassing.''"{/for}{for fx57}"''Sorry. We're having trouble getting your pages back.''"{/for}) page when you restart Firefox, click the {for not fx57}{button Close}{/for}{for fx57}{button Start New Session}{/for} button to start a new session and then follow the instructions given below to fix the problem. = Change the action for a content type = You may be able to fix the problem by finding the content type that is set to use Firefox and then changing the action, using these steps: # [[T:optionspreferences]] # {for not fx56}Select the {menu Applications} panel.{/for}{for fx56}In the {menu General} panel, go to the '''Applications''' section.{/for} # If you know which item in the Content Type column is causing the problem, select it. Otherwise, in the Search box, type ''Use Firefox''. The list will display only items that are set to "Use Firefox". #;{for not fx56}[[Image:Applications - Use Firefox 38]]{/for}{for =fx56}[[Image:Fx56GeneralApplications-UseFirefox]]{/for}{for fx57}[[Image:applications setting 57]]{/for} # For each problematic content type, select a new action from the menu in the Action column. If you're not sure which action to pick, choose '''Always ask'''. # [[T:closeOptionsPreferences]] For general information on content types, see [[Change what Firefox does when you click on or download a file]]. = Reset actions for all content types = If the preceding steps didn't fix the problem, or if you can't find the problematic item in the Applications list, you will have to reset the actions for all content types by manually deleting the file that stores these settings. {note}This will remove all customized content type actions, not just the one that is causing the problem. You will have to make those changes over again after taking these steps.{/note} # [[T:profileFolder]] # Close Firefox. [[T:closeFirefox]] # Delete the file named {for not fx55}{filepath mimeTypes.rdf}{/for}{for fx55}{filepath handlers.json}{/for}. # Restart Firefox. {for win} = Check for malware = If the problem is still not solved, or if Firefox is opening multiple tabs or windows with unwanted content, consider that your system may be infected by [http://en.wikipedia.org/wiki/Malware malware]. For more information, see [[Is my Firefox problem a result of malware]]. {/for}