1893293 - The dynamic toolbar interferes with the scroll physics of short flings (with toolbar-on-top)

Status: NEW

(GeckoView :: General, defect)

Description

[Markus Stange [:mstange]]

Attachment: screen recording

Steps to reproduce:

1. In Firefox for Android, enable the dynamic toolbar and put it at the top.
2. Go to a simple page like https://www.mozilla.org/en-US/
3. Scroll down.
4. Do a series of short and gentle flings: down, down, up, up, down, down, up, up. Only keep the finger on the screen for a short distance and don't go very fast. Make sure the touch gestures are very similar to each other.

Expected results:
A fling should result in the same scrolling (of the page relative to the screen) regardless of what state the dynamic toolbar is in.

Actual results:
When a fling causes the dynamic toolbar to transition between its hidden/visible states, the fling feels totally different.

The dynamic toolbar should not interfere with fling physics.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The component has been changed since the backlog priority was decided, so we're resetting it.
For more information, please visit BugBot documentation.