Unfortunately this is a known issue - and it been an issue from the start. We currently don't measure what UI elements of Fenix cover the engine view to automatically inform GeckoView about them but "manually" compute the height of the top & bottom toolbars/banners like [here](https://searchfox.org/firefox-main/rev/d4456d810664a2a13a871a68e5323522a78c1131/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/ext/Fragment.kt#263-296) where we don't account for the autofill banner (and others). Talked recently with @mstange about this, the APZ team is aware of these issues. We do plan on improving things next year. Created now [this meta](https://bugzilla.mozilla.org/show_bug.cgi?id=2006842) to hang tickets like this to for ensuring we'll not forget about checking them.
Bug 2006761 Comment 5 Edit History
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Unfortunately this is a known issue - and it has been an issue from the start. We currently don't measure what UI elements of Fenix cover the engine view to automatically inform GeckoView about them but "manually" compute the height of the top & bottom toolbars/banners like [here](https://searchfox.org/firefox-main/rev/d4456d810664a2a13a871a68e5323522a78c1131/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/ext/Fragment.kt#263-296) where we don't account for the autofill banner (and others). Talked recently with @mstange about this, the APZ team is aware of these issues. We do plan on improving things next year. Created now [this meta](https://bugzilla.mozilla.org/show_bug.cgi?id=2006842) to hang tickets like this to for ensuring we'll not forget about checking them.