I did some looking into this, I think the actual regression is this one: https://bugzilla.mozilla.org/show_bug.cgi?id=2054518
Bug 2057201 Comment 7 Edit History
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I did some looking into this, I think the actual regression is this one: https://bugzilla.mozilla.org/show_bug.cgi?id=2054518 it sets `focusOnAddressBar = false` whenever `enableHomepageTrendingRecentSearch` is on (default true on Nightly).