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by HWR_14 1472 days ago
Including on iOS? I thought that they never supported v2 on iOS and only moved to something similar to v3.
2 comments

"The most widely noted change in Mv3 – and there are many that have significant implications – is the removal of the blocking version of the webRequest API, which is being replaced by an API called declarativeNetRequest."

Safari supports and will continue to support v2, but Safari never supported blocking webRequest.

Thanks. That aligns with my fuzzier understanding.
It sounds like they don't support persistent background pages, for power usage reasons probably, so extensions have to adopt to that.