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I am using Firefox 13 on my mac. When I go to youtube large ads appear on the left and right side and block the video. You can not close out the ads.

gaileymg
gaileymg
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Ads also appear in Facebook. The problem does not happen when I am using Safari. I have uninstalled and re-installed Firefox. I have never had this problem with Firefox.

Ads also appear in Facebook. The problem does not happen when I am using Safari. I have uninstalled and re-installed Firefox. I have never had this problem with Firefox.

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jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 25 Contributor
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Might be caused by an add-on. Can you go through your list of add-ons and disable everything non-essential, then restart Firefox and check again.

Tools > Add-ons > Plugins
Tools > Add-ons > Extensions