Can someone recommend an add on for Firefox that will block ads only on specific site? Adblock has option only to allow specific sites, but I need the opposite of that.

1 Answer 1


As long as you don't mind going through filters rather than the GUI there is a very easy way to do that with AdBlock Plus.

How to do it:

  • Install AdBlock Plus
  • restart browser if required
  • Go to Tools->Adblock Plus->Filter Preferences (or just press ctrl-shift-F)
  • Go to Custom Filters tab
  • add new rule and use this as the rule: @@$document,domain=~sitetoenableon.ca|~sitetoenableon2.com|~sitetoenableonn.com

This will disable ABP on all sites not listed in that rule. You can edit the rule any time through the same form to add more sites.

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