1871788 - [Tabs tray to Compose] too easy to swipe close a tab when flinging the tab list

Status: RESOLVED DUPLICATE of bug 1854335

(Fenix :: Tabs, defect)

Description

[Mark]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:121.0) Gecko/20100101 Firefox/121.0

Steps to reproduce:

Enable Tabs tray to Compose
Open many tabs
Fling tabs list upwards eg using thumb so the gesture is mostly vertical but slightly diagonal

Actual results:

Very often the slightly diagonal upwards fling results in the swipe-to-close gesture and a tab closes. It's very very annoying.

This does NOT happen with the previous "non-Compose" tabs tray.

Expected results:

I think the Compose tab tray swipe-to-close logic only looks at the horizontal component of the fling velocity, so a fling gesture results in a swipe-to-close any time the horizontal velocity exceeds the threshold, even if the fling is mostly vertical. I think this is incorrect behavior.

I think the non-Compose tab tray looks at both components of fling velocity and prevents the swipe-to-close if the gesture is substantially vertical, even if the horizontal component of the swipe exceeds the swipe to close threshold. Much better.

Comment 1

[Mark]

Touch a tab and drag a few mm sideways as if to begin a swipe-to-close. Turn the gesture into a vertical fling:- swipe vigorously mostly vertically but with a slight horizontal component. The non-Compose tab snaps back and does not close, even if the fling is at ~45 degrees. The Compose tab usually closes, the fling has to be almost vertical to avoid it closing.

Comment 2

[henri.j.hanninen]

I am suffering from this issue as well, both grid and list view on beta and nightly. Tabs close insanely easily, I have to scroll tabs very very carefully to not close any, and a careless swipe to scroll is almost guaranteed to close a tab. Severely impacting user experience.

Comment 3

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

The severity field is not set for this bug.
:007, could you have a look please?

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Comment 4

[Noah Bond [:007]]

Thanks for filing this bug! I'm closing this as a duplicate of Bug 1854335, so please follow that one for updates on this issue.