Re: [whatwg/fetch] Allow user agents to use more permissive header validation in extensions (Issue #1878)

domfarolino left a comment (whatwg/fetch#1878)

Sounds like most extensions implementers are OK with the prose "appropriately-privileged web extension contexts", but I tend to agree with @annevk that it'd be better to express this explicitly as a boolean on something like ESO. This gets more clean and possible as the [Web Extensions specifications get more formal](https://github.com/w3c/webextensions/tree/main/specification)—those extensions would define their creation in some way, and bootstrap their ESO with this boolean that other standards like Fetch can explicitly reference.

However, it looks like the `window.browser.bs` spec hasn't been touched in a couple of years, so before that gets updated to help formalize more of this and its permissions, I would also accept prose like "Appropriately-privileged web extension contexts" as a holdover, with the expectation that we make it more explicit when the extensions specifications catch up.

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Received on Thursday, 14 May 2026 05:43:11 UTC