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Mind you, we're talking about "sanity checks" here, not actions: presumably these are XHR GETs.

In HTTP-semantic terms, you're always allowed to retry GETs, and they're always supposed to be idempotent (or not change state at all, but that's a lost battle.)

There's no reason that the browser shouldn't default to automatically retrying (with back-off) GET XHRs, save for how many sites are built without a proper understanding of HTTP semantics.

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