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this add-on could not be installed because it appears to be corrupted in mozilla

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  • 58 have this problem
  • 20492 views
  • Last reply by cor-el

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this add-on could not be installed because it appears to be corrupted in mozilla

Chosen solution

This happens when the extension is signed and has been changed (tampered with). Make sure that security software doesn't unpack the file for inspection and repacks it because that will invalidate the signing manifest.

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What add-on? From who, where? What does it do?

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Chosen Solution

This happens when the extension is signed and has been changed (tampered with). Make sure that security software doesn't unpack the file for inspection and repacks it because that will invalidate the signing manifest.