For some reason I get expected-results here if I Shift+Click on the link (for open-in-new-window), whereas I get actual-results if I ctrl+click (open-in-new-tab) or just directly click on the link.
Bug 1940025 Comment 6 Edit History
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For some reason I get expected-results here if I Shift+Click on the link (for open-in-new-window), whereas I get actual-results if I ctrl+click (open-in-new-tab) or just directly click on the link. (Presumably that's just a bit of luck from the overhead of setting up a new Firefox window, which maybe changes the ordering of events here slightly.)