1723644 - Middle mouse scroll state (scroll icon) is retained across tabs when a tab closes

Status: UNCONFIRMED

(Core :: DOM: UI Events & Focus Handling, defect, P3)

Description

[a1234686809]

User Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36

Steps to reproduce:

• press the middle mouse button (when there is a scrollbar)
• the scroll icon will apear (IT SHOULD NOT! IT SHOULD ONLY APPEAR WHEN THE MOUSE MOVES)
• (Optional step: release middle mouse - mouseup. Mouseup does not cancel the state if the next step happens!)
• close the tab/window programmatically eg. window.close() triggered on mousedown or mouseup
• The middle mouse scroll state and icon is retained on the new window

Actual results:

• The middle mouse scroll state and icon is retained on the new tab/window and will block a mouse button event on that window.

Expected results:

• The middle mouse scroll state should have been reset/cancelled. The scroll state of a tab/window should not ever affect another tab/window!

Comment 1

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

The Bugbug bot thinks this bug should belong to the 'Core::DOM: UI Events & Focus Handling' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 2

[a1234686809]

See this is why we use Chrome. No bugs.
This is just going to be ignored.

Comment 3

[Olli Pettay [:smaug][[e-mail]]]

When autoscroll is enabled, the icon should be shown when middle-clicking.

But yes, the icon should be hidden if window is closed.