It's a great argument against centrally controlled walled gardens. Basically breaking or compromising a single certificate has a widespread impact. Even Tor browser is impacted. For most of us this is a temporary inconvenience but there are people whose personal security depends on some of the extensions that just stopped working.

On a positive note, it's been a while since I browsed without a lot of extensions. Ads are still annoying and I noticed some extensions apparently had more of a performance impact than you'd hope.