[Webkit-unassigned] [Bug 246617] New: Extension frames fail to be embedded on websites

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=246617

            Bug ID: 246617
           Summary: Extension frames fail to be embedded on websites
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Extensions
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: carlosj-webkit-bugzilla at jeurissen.co
                CC: timothy at apple.com

Trying to put a view (html page) from a web extension into an iframe on a website. The html file is listed correctly in web_accessible_resources, however when I'm trying to load it, I get the following error: Failed to load resource: The operation couldn’t be completed. (Cocoa error -1008.)

Sample extension can be found here:
https://github.com/carlosjeurissen/webext-tech-demo-extensions/tree/main/issues/safari-8986072-frame-extension-on-website

In browsers like Firefox and Chrome. The frame is loaded and says "frame". In Safari it doesn't load and thus is blank.

Previously reported as:
https://feedbackassistant.apple.com/feedback/8986072
https://developer.apple.com/forums/thread/672746

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