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My JavaScript is enabled but in facebook and youtube the sites alert me to enable my JScript! and I can't watch video or use the facebook because of that? How can I solve it?

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I have a Fujitsu Esprimo Mobile laptop and the OS: original Win XP professional Ver. 2002 SP3

I have a Fujitsu Esprimo Mobile laptop and the OS: original Win XP professional Ver. 2002 SP3

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Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"

"Remove Cookies" from sites causing problems:

  • Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

y*https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes