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I can't launch firefox - get "Firefox can't establish a connection to the server at en-us.start3.mozilla.com." Other browsers work. Windows XP SP3

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  • Last reply by cor-el

chanchak
chanchak
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I'm running Windows XP, SP3 - keep it updated with security patches, etc. I prefer Firefox as my default browser, but can no longer load it. I've uninstalled and reinstalled it. Also have received clean scans with McAfee, Windows Defender, MalwareBytes, and Ad-Aware.

I'm running Windows XP, SP3 - keep it updated with security patches, etc. I prefer Firefox as my default browser, but can no longer load it. I've uninstalled and reinstalled it. Also have received clean scans with McAfee, Windows Defender, MalwareBytes, and Ad-Aware.

All Replies (2)

Old_Runner
Old_Runner
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I'm sorry to be off topic, but I can't find a way to post a new question. I keep trying find out asking why Firefox won't start, nor will Profile Manager nor Firefox Safe Mode.

I'd also like to know how to use this forum properly.

Thanks

cor-el
cor-el
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  • Top 10 Contributor
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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.

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

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems