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

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

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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Additional System Details

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36

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FredMcD
  • Top 10 Contributor
4269 solutions 59882 answers

Helpful Reply

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

What add-on? From who, where? What does it do?
cor-el
  • Top 10 Contributor
  • Moderator
17578 solutions 159001 answers

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.

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. *https://support.mozilla.org/kb/add-on-signing-in-firefox *https://wiki.mozilla.org/Addons/Extension_Signing