This regresses bug 1855990. When the default mode for `interactive-widget` is set, the condition in [`AsyncPanZoomController::ZoomToRect`](https://searchfox.org/mozilla-central/source/gfx/layers/apz/src/AsyncPanZoomController.cpp#6105) does not evaluate to `true` because `scrollableRectHeight` is always larger than `lvh`. (reproducible with attached test page interactive-widget-default) In contrast, when setting `interactive-widget=resizes-content`, the condition does evaluate to `true` and the toolbar can be hidden. Which as of now is only seen on GeckoView and will be available on Fenix when bug 1900622 is resolved. (reproducible with attached test page interactive-widget-resizes-content)
Bug 1920019 Comment 0 Edit History
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This regresses bug 1855990. Hiding the toolbar wouldn't be the correct behavior. See [comment #2](https://bugzilla.mozilla.org/show_bug.cgi?id=1920019#c2) and [comment #3](https://bugzilla.mozilla.org/show_bug.cgi?id=1920019#c3) When the default mode for `interactive-widget` is set, the condition in [`AsyncPanZoomController::ZoomToRect`](https://searchfox.org/mozilla-central/source/gfx/layers/apz/src/AsyncPanZoomController.cpp#6105) does not evaluate to `true` because `scrollableRectHeight` is always larger than `lvh`. (reproducible with attached test page interactive-widget-default) In contrast, when setting `interactive-widget=resizes-content`, the condition does evaluate to `true` and the toolbar can be hidden. Which as of now is only seen on GeckoView and will be available on Fenix when bug 1900622 is resolved. (reproducible with attached test page interactive-widget-resizes-content)