FWIW, with the builds from comment 81 (on Windows) the test from comment 52 passes (or at least, a reasonable page is shown), while on current Nightly it fails (endless loading). I did try with edge and there it seems to work, though smaug suggested in comment 55 it does not work for any browser, but that was a while ago. So if others users could please confirm that the build from comment 81 solves their problem, that would be great.
Bug 1753352 Comment 83 Edit History
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FWIW, with the builds from comment 81 (on Windows) the test from comment 52 passes (or at least, a reasonable page is shown), while on current Nightly it fails (endless loading). I did try with edge and there it seems to work, though smaug suggested in comment 55 it does not work for any browser, but that was a while ago. So if other users could please confirm that the build from comment 81 solves their problem, that would be great.