Changes to Cross-Origin Requests in Chrome Extension Content Scripts

tl;dr: To improve security, cross-origin fetches will soon be disallowed from content scripts in Chrome Extensions. Such requests can be made from extension background pages instead, and relayed to content scripts when needed. [The document has been edited on 2020-09-17 to reflect that CORS-for-content-scripts has successfully launched in Chrome 85*.]*** Overview When web pages request cross-origi

[efcl]

Chrome拡張のContent scriptsのFetch APIでクロスオリジンはできなくなる話

[michael26]

Chrome Extensionのcontent scriptでcross-origin requestができなくなった。