The whole manifest v3 announcement happened years ago and it's been at least a year since the timeline for the deprecation of manifest v2 got announced so it seems like as good a time as any to remind...
Neither has its own extension repository, so maintaining support enables side loading but isn’t all that useful for normal people or those who want their extensions to be up to date.
Brave shields work better than the built-in protection in Vivaldi, so it’s less of an issue there but still frustrating.
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Vivaldi has said they will as long as the code is in Chromium, and are planning on it going away by June of next year.
No idea about Brave, I don’t use it and never will.
This did give me the motivation to switch to back to Firefox, and later possibly Librewolf though, so thanks Google.
Neither has its own extension repository, so maintaining support enables side loading but isn’t all that useful for normal people or those who want their extensions to be up to date.
Brave shields work better than the built-in protection in Vivaldi, so it’s less of an issue there but still frustrating.