Beats me, but it seems not all tests run on Linux TRY. There tests within dom/ that only failed on Windows and or Android when pushing the pref for blocking toplevel data: URI navigations.
Created attachment 8907017 [details] [diff] [review] bug_1399074_more_dom_tests.patch Smaug, sorry for the additonal work, but it seems not all tests run on Linux, hence I missed those tests to udpate in my other patch for dom/ tests. Hopefully I got them all this time around: * dom/tests/mochitest/bugs/test_resize_move_windows.html We are also setting security.data_uri.unique_opaque_origin, hence I think it's fine to also push the pref here explicitly. * dom/browser-element/mochitest/test_browserElement_inproc_CopyPaste.html * dom/browser-element/mochitest/test_browserElement_inproc_BrowserWindowResize.html * dom/browser-element/mochitest/test_browserElement_inproc_Close.html * dom/browser-element/mochitest/test_browserElement_inproc_ContextmenuEvents.html * dom/browser-element/mochitest/test_browserElement_inproc_DataURI.html * dom/browser-element/mochitest/test_browserElement_inproc_TopBarrier.html For tests within browser-element I am pushing the pref within browserElementTestHelpers. Would you be fine with that change. It seems rewriting all of those tests would require quite some effort.
Comment on attachment 8907017 [details] [diff] [review] bug_1399074_more_dom_tests.patch Hmm, we do need proper tests for mozbrowser. There has been some talk to expose the functionality to webextensions and at least at some point devtools wanted to use mozbrowser. If you write some explicit test checking that data: loads work the expected ways in mozbrowsers, then we can take this.
(In reply to Olli Pettay [:smaug] from comment #2) > If you write some explicit test checking that data: loads work the expected > ways in mozbrowsers, then we can take this. I filed Bug 1399170 to do so.
Pushed by firstname.lastname@example.org: https://hg.mozilla.org/integration/mozilla-inbound/rev/be5bcc9e9657 Update more tests within dom/ to comply with new toplevel data: URI navigation policy. r=smaug