I see a variety of error pages when bisecting between 2018 and current builds. 2018ish builds give an error page about remote XUL. 2019ish builds give me a yellow XML syntax error page. 2020-2021ish builds give me no error page; the navigation just stops, and then I can interact with the page. 2022ish builds give me the page freeze (can't click anything, e.g. can't click "Details" link in comment 0 here). The regression range for switching to the page-freeze behavior is when we enabled fission: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=383986e2f5cb835a55c47bbd6e15d81035ca0784&tochange=d6e8528f0a936df88369c71f4e390e31a4d621a1
Bug 1799973 Comment 2 Edit History
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I see a variety of error pages when bisecting between 2018 and current builds. 2019-06-01 gives me an error page about remote XUL. 2019-12-01 gives me a yellow XML syntax error page. 2020-2021ish builds give me no error page; the navigation just stops, I'm still looking at this same Bugzilla page, and I can interact with it (e.g. I can click "Details" in comment 0) 2022ish builds give me the page freeze (can't click anything, e.g. can't click "Details" link in comment 0 here). The regression range for switching to the page-freeze behavior is when we enabled fission: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=383986e2f5cb835a55c47bbd6e15d81035ca0784&tochange=d6e8528f0a936df88369c71f4e390e31a4d621a1