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when on facebook in Mozilla, I have a number of flashing ads. I don't have them in IE

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I have noticed within the past few weeks, when I'm on Facebook in Mozilla, I have a number of flashing annoying ads. I do not have them in Chrome, Safari, or IE. I have tied to use the adblock add-on to block them but I can't. It only seems to be happening on Facebook.

I have noticed within the past few weeks, when I'm on Facebook in Mozilla, I have a number of flashing annoying ads. I do not have them in Chrome, Safari, or IE. I have tied to use the adblock add-on to block them but I can't. It only seems to be happening on Facebook.

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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


Do a malware check with a few malware scan programs. You need to use all programs because each detects different malware. Make sure that you update each program to get the latest version of the database before doing a scan.

See also "Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked and What to do when searches take you to the wrong search website