Non sequitur. An installed addon could be signed with a certificate. Mozilla can push out a revocation for that certificate if it deems it appropriate. The revo

Non sequitur. An installed addon could be signed with a certificate. Mozilla can push out a revocation for that certificate if it deems it appropriate. The revocation can pop up a modal telling users it wants to disable the addon. The user can click 'Disable addon' or 'Ignore (dangerous)'. This doesn't need to be done through a dead man's switch (expiring certificate) that someone will forget to renew.