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FF3.6.1 and later won't start on laptop with XP Home, works great on XP pro desktop - both running SP3. Installs but exits after 1-2 secs. I think a security feature in XP Home the cause but no idea what

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I don't run Adobe, I uninstalled all addons, I stopped registry mechanic, 3.0.13 and 3.0.15 run fine. IE 7 runs fine

I stopped MS firewall and then tried adding Mozilla to firewall, no diff.

Never had an iota of a problem with desktop only laptop. Even with addons and Adobe installed. Desktop running 2006 version of XP with SP3 added last week. Laptop running 2008 version of XP with SP3 added in 2008.

After install when click to start HD light goes on for 2 secs and off and nada. Second try gets blip and then nada. Restart gets same start pattern..

I think it is an auto security setting in XP Home but no idea what.

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Please only use either 3.5.11 or 3.6.8 (or newer versions that are eventually released). Other versions of Firefox are not supported.

That said, hopefully this support article is what you need:

In any case, it's possible that you are having a problem with some Firefox add-on that is hindering your Firefox's normal behavior. Have you tried disabling all add-ons (just to check), to see if Firefox goes back to normal?

Whenever you have a problem with Firefox, whatever it is, you should make sure it's not caused by one (or more than one) of your installed add-ons, be it an extension, a theme or a plugin. To do that easily and cleanly, run Firefox in safe mode (don't forget to select Disable all add-ons when you start safe mode). If the problem disappears, you know it's from an add-on. Disable them all in normal mode, and enable them one at a time until you find the source of the problem. See this article for information about troubleshooting extensions and themes and this one for plugins.

If you need support for one of your add-ons, you'll have to contact its author.

If the problem does not disappear when all add-ons are disabled, please tell me, so we can work from there. Please have no fear of following my instructions to the line, as all can be easily undone.

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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

Your plugins list shows outdated plugin(s) with known security and stability risks.

  • Shockwave Flash 10.0 r42
  • Next Generation Java Plug-in 1.6.0_16 for Mozilla browsers

Update the Java plugin to the latest version.

Update the Flash plugin to the latest version.