Hi @k.muraki , We understand your problem. This has been caused by a certificate issue. Firefox Team is currently working on a fix and will be providing updates on this thread: Certificate issue causing add-ons to be disabled or fail to install.
Hi @k.muraki , We understand your problem. This has been caused by a certificate issue. Firefox Team is currently working on a fix and will be providing updates on this thread: Certificate issue causing add-ons to be disabled or fail to install.