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Firefox does not install adblock plus although I allow it a box appears saying the signature can't be controlled

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  • 93 have this problem
  • Last reply by xtral_bg

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Just reinstalled the computer and downloaded firefox 3.6 I can't figure out why I get this message (translated from swedish) although I have clicked the option Allow:

"Firefox can't install the file from

because: signature could not be controled. -260"

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I have the same problem