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firefox will not open (have tried "run in safe mode" and other alternatives)

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bill02790

firefox unexpectedly closed; i tried to reopen- no luck; rebooted computer and "add-ons" opened but firefox did no! now firefox trys to open for about 10 sec and then quits trying. i have no messages/promts or any kind of other indication that there is aproblem (other than the browser won't open). i am using google chrome to post this request. thanks in advance for any suggestions! bill crimmins

firefox unexpectedly closed; i tried to reopen- no luck; rebooted computer and "add-ons" opened but firefox did no! now firefox trys to open for about 10 sec and then quits trying. i have no messages/promts or any kind of other indication that there is aproblem (other than the browser won't open). i am using google chrome to post this request. thanks in advance for any suggestions! bill crimmins

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See http://kb.mozillazine.org/Browser_will_not_start_up

Did you check your security software (firewall)?

A possible cause is security software (firewall) that blocks or restricts Firefox without informing you about that, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process.

See Server Not Found - Troubleshoot connection problems and Configure firewalls so that Firefox can access the Internet and http://kb.mozillazine.org/Firewalls