Mozilla warns users to update Firefox before certificate expires

Users need to update their browsers to Firefox 128 (released in July 2024) or later and ESR 115.13 or later for 'Extended Support Release' (ESR) users.

"On 14 March a root certificate (the resource used to prove an add-on was approved by Mozilla) will expire, meaning Firefox users on versions older than 128 (or ESR 115) will not be able to use their add-ons," warns a Mozilla blog post.