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When I try to update the ad block filters it failed to download. How do I fix it?

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I downloaded a filter for it two days ago it worked fine then. The ad on and fire fox is fully updated.

I downloaded a filter for it two days ago it worked fine then. The ad on and fire fox is fully updated.

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Which add-on do you have installed?

AblockPlus filtersets update automatically every 5 days.