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Priority: -- → P3
Brian, we are about to block toplevel data: URI navigations within Firefox (because those navigations are mostly only used for phishing attempts). Flipping the pref |security.data_uri.block_toplevel_data_uri_navigations| causes two tests within devtools/ to fail: * browser_markup_update-on-navigtion.js * test_saveHeapSnapshot_e10s_01.html Please note that even though the updated code within test_saveHeapSnapshot_e10s_01.html looks like it's an iframe, it's created through mozbrowser, which basically creates a new toplevel context, hence it would be blocked by the pref.
Attachment #8905413 - Flags: review?(bgrinstead)
Priority: P3 → P1
Whiteboard: [domsecurity-backlog1] → [domsecurity-active]
Attachment #8905413 - Flags: review?(bgrinstead) → review+
Pushed by email@example.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/860d5124faec Update tests within devtools/ to comply with new toplevel data: URI navigation policy. r=bgrinstead
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