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Firefox is not blocking this popup window "http://c5.zedo.com/" I have it blocked in the Tools page but it still comes through

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Can't seem to block this pop-up window using Tools, Options, Exceptions. This is the website in the address bar: http://c5.zedo.com/

Don't know how to eliminate this junk.

Thank you Tom Garven Lake Havasu City, AZ

Can't seem to block this pop-up window using Tools, Options, Exceptions. This is the website in the address bar: http://c5.zedo.com/ Don't know how to eliminate this junk. Thank you Tom Garven Lake Havasu City, AZ

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