Firefox add-ons disabled en masse after Mozilla certificate issue

Firefox users report having add-ons disabled, being unable to re-activate or (re)-install extensions.

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What Mozilla needs to do now (after cert add-on disabling disaster

Configuring Mozilla Firefox - WebMoney Wiki

Firefox Addons Being Disabled Due to an Expired Certificate

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Firefox certificate error disabled all extensions for users

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Firefox Addons Being Disabled Due to an Expired Certificate

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Firefox: Expired certificate disables addons (May 4, 2019