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why the speed of firefox 3.6.12 more decreased in comparison with others are like the chrome browser? I really hope the speed could be better than other browsers like firefox previous versions.

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  • Last reply by cor-el

why the speed of firefox 3.6.12 more decreased in comparison with others are like the chrome browser? I really hope the speed could be better than other browsers like firefox previous versions. thanks team

why the speed of firefox 3.6.12 more decreased in comparison with others are like the chrome browser? I really hope the speed could be better than other browsers like firefox previous versions. thanks team

All Replies (1)

If you notice significant speed differences after updating then you should check your security software.

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).

  • Don't make any changes on the Safe mode start window.

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


Create a new profile as a test to check if your current profile is causing the problems.

See Basic Troubleshooting: Make a new profile

There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins"

If that new profile works then you can transfer some files from the old profile to that new profile (be careful not to copy corrupted files)

See http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox