Reflect redirects to worker global scope's URL

Category: Miscellaneous
Type: New or changed feature
Status: Enabled by default (Chrome 74)
Intent stage: None

Summary

Worker global scope's URL (self.location, referrer, and base URL) should reflect redirects (i.e. should be the response URL, not the request URL), according to the spec. The worker global scope's URL has been the response URL in Firefox and the request URL in Chromium/Safari/Edge. Chromium is changing it to the response URL to match with the spec. Spec issue: https://github.com/whatwg/html/issues/3760

Standards & signals

Specification: https://html.spec.whatwg.org/multipage/workers.html#run-a-worker
Firefox: Shipped/Shipping
Safari: No signal
Web developers: No signals
Tracking bug: https://crbug.com/861564

Docs: https://docs.google.com/document/d/1lGBoqIfcQJk1z1ffv-v7GVFJdYw78tXUCRKcAba6nyg/edit?usp=sharing

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