RESOLVED FIXED311836
[Web Inspector] [Site Isolation] Add inspector test for Page.setEmulatedMedia with cross-origin iframes under site isolation 
https://bugs.webkit.org/show_bug.cgi?id=311836
Summary [Web Inspector] [Site Isolation] Add inspector test for Page.setEmulatedMedia...
Brandon
Reported 2026-04-09 11:49:22 PDT
Add a layout test that verifies Page.setEmulatedMedia propagates to cross-origin iframes when site isolation is enabled. The test emulates print media via Web Inspector, reloads, and confirms that @media print styles in a cross-origin iframe (running in a separate process) are correctly applied.
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Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2026-04-09 11:49:28 PDT
<rdar://problem/174427083>
Brandon
Comment 2 2026-04-09 11:50:15 PDT
Pull request: https://github.com/WebKit/WebKit/pull/62371
EWS
Comment 3 2026-04-17 06:42:14 PDT
Committed 311447@main (5a58e93edb20): <https://commits.webkit.org/311447@main> Reviewed commits have been landed. Closing PR #62371 and removing active labels.
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