I think this is fixed. In Firefox Nightly, the testcase from comment 0 now renders the same as Chrome/Safari (i.e. we match the renderings shown in the screenshot). Looks this was a dupe of bug 1457628 given comment 1 here. I confirmed that the fix range seems to match, using: ``` mozregression --pref "security.sandbox.content.level:0" --bad 2019-07-11 --good 2021-07-13 --find-fix ``` (and indeed, the "bad" build is "bad" and the "good" build is "good")
Bug 1460186 Comment 5 Edit History
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I think this is fixed. In Firefox Nightly, the testcase from comment 0 now renders the same as Chrome/Safari (i.e. we match the renderings shown in the screenshot). Looks this was a dupe of bug 1457628 given comment 1 here. I confirmed that the fix range seems to match, using this command, straddling the date that bug 1457628 was fixed: ``` mozregression --pref "security.sandbox.content.level:0" --bad 2019-07-11 --good 2021-07-13 --find-fix ``` (and indeed, the "bad" build is "bad" and the "good" build is "good")