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I can't load certain Websites that I was able to load in the past

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I can load these Websites in Chromium. Tried to add Adblock Plus and that's when the trouble started. YouTube is affected.

I can load these Websites in Chromium. Tried to add Adblock Plus and that's when the trouble started. YouTube is affected.

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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 or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).