Re: [whatwg/url] Origin of blob URLs doesn't match what implementations do (#127)

The blob store concept as defined in the latest version of the File API spec definitely needs work, as it doesn't actually reflect what browsers do (and also doesn't seem to match what older versions of the File API spec did). Having it per execution context as in the current spec certainly doesn't seem like it would make sense, as using blob urls in other execution contexts is definitely something that works today. I believe in chrome the thing that best reflects the "blob store" concept is actually fully global. But then the blob url -> (possibly opaque) origin map chrome also maintains is more per event loop. I really need to find the time to figure out what browsers are actually doing in this space, and then figure out how to best write that down in the spec, as what is currently in the specs about blob URLs is all over the place and certainly doesn't match reality...

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