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I have placed a check mark in the Block Pop-Up Windows box and when I restart Firefox, the box is empty and I begin receiving Pop-Up's again. What do I have to do to make the check-mark permanent?

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I have placed a check mark in the Block Pop-Up Windows box but when I restart Firefox, the box is empty and I begin receiving Pop-Up's again. What do I have to do to make the check-mark permanent?

This happened

Every time Firefox opened

I have placed a check mark in the Block Pop-Up Windows box but when I restart Firefox, the box is empty and I begin receiving Pop-Up's again. What do I have to do to make the check-mark permanent? == This happened == Every time Firefox opened

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