Это еще не все - оказалось что протухание сертификата привело еще и к "грохингу" некоторых аддонов браузером - https://bugzilla.mozilla.org/show_bug.cgi?id=1549129 Процитирую, это реально смешно :

"We derive the extension ID from the add-on's signature. When the signature is not recognized (e.g. because of bug 1548973), we fall back to manifest.json. But the ID in manifest.json is not required, so we end up believing that some extension packages are not associated with the ID when we parse the XPI again.

When the XPI file has been modified (this does normally not happen), we try to update the database based on the disk content, and because we cannot find an ID, we delete the xpi here in XPIDatabase.jsm. Note that any data that the add-on saved is not lost, and becomes available again when the user re-installs the add-on." "The bug happens when: The signature of a xpi is invalid (e.g. by bug 1548973 without any fix (hotfix or bug 1549061)).

The last modified date of the xpi does not match with the one in our database.

Firefox restarts." Из явно затронутых называют EPUBreader. P.S. Все "темы" из браузера у меня оказались тоже удалены.

