[UX Feedback] Add a divider line between the Fenix's bottom address bar and the Android's Gesture navigation pill bar

[ghost]

This was first reported here: #11862 (comment)

The fact remains that if we add the sort of gestures #11862, #12874 or any gesture at the Fenix's bottom address bar, it'll trigger the Android app multitasking gesture (recents app switcher). There's a very tiny space left between the Fenix and Android gesture navigation pill bar (see the Screenshot¹ for pill I'm talking about) and some (read a lot) Android OEMs hide that pill button bar altogether (see the Screenshot²) making it even harder to not trigger the Android recents app switcher gesture instead of what the issue related to gestures on Fenix's bottom address bar want to trigger.

However, if we add a divider line between Fenix's address bar and the Android's gesture navigation pill bar so that it at least becomes easy to spot where the Fenix's address bar is or Fenix's app window itself is ending and where the Android's gesture navigation pill bar is starting so that users can correctly try to aim for the Fenix's address bar when it's at the bottom. Currently it feels like everything is a part of the of Fenix including the Gesture navigation pill bar and this makes it harder to spot where the Fenix's app window is ending and where the Android's navigation pill area starts

Even if no gestures are implemented at the Fenix's bottom address bar, I think this is something we should add as it'll make it easier to know where the browser is ending and the Android's navigation bar itself is starting and the fact that most browsers already do this makes it concrete that this something users will expect

And yes, that divider line should be visible above the Android's navigation pall bar even when the dynamic toolbar hides away. Just like how Chromium browsers like Chrome and Kiwi browser do.

This is something that Chromium browsers already do. Please see the screenshots as I might be using some wrong terms as I'm not that familiar with Android UI's technical terms.

Thak you. 😀

Chrome browser:

Vivaldi browser:

Brave browser:

Kiwi browser:

When address bar is visible:

UNITO-UNDERSCORE!20200724!UNITO-UNDERSCORE!140756.jpg!

When address bar is not visible:
UNITO-UNDERSCORE!20200724!UNITO-UNDERSCORE!141732.jpg!

This is how Fenix does it (observe that hard hard it is to spot where the Fenix and Android navigation bar starts:

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1. Screenshot¹: ![](https://user-images.githubusercontent.com/68282543/88359482-657e9280-cd90-11ea-8197-11592f8b31de.jpg)

1. Screenshot²: ![](https://user-images.githubusercontent.com/68282543/88359504-78916280-cd90-11ea-9ed3-587799a13264.jpg)

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[stale]

See: #17373 This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.