1635624 - animations not disabled anymore in beta 77.0b1 despite toolkit.cosmeticAnimations.enabled set to false (tab open and tab close animations)

Status: RESOLVED INVALID

(Firefox :: Untriaged, defect)

Description

[alexander.kern]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:77.0) Gecko/20100101 Firefox/77.0

Steps to reproduce:

Close, open or let a tab load completely

Actual results:

Animations show for each: Close, open, load (blue growing glow)

Expected results:

No animations should be shown, as it was the case before version 77.0b1. I used a 76 beta before where it was still working as expected.

Hope this bug hasn't been reported already, I did look some time for it. Thanks for your contributions to software freedom!

Comment 1

[Matti Hämäläinen]

Apparently it's due to this https://bugzilla.mozilla.org/show_bug.cgi?id=1634861

Comment 2

[Matti Hämäläinen]

And ultimately also this: https://bugzilla.mozilla.org/show_bug.cgi?id=1478597

Comment 3

[Adrian Florinescu [:aflorinescu]]

Dao, could you please help triage this?

Comment 4

[Firefox Bug Husbandry Bot]

Because this bug's Severity is normal and has not been changed, and this bug's priority is -- (none,) indicating it has has not been previously triaged, the bug's Severity is being updated to -- (default, untriaged.)

Comment 5

[Dão Gottwald [:dao]]

(In reply to Matti Hämäläinen from comment #2)

And ultimately also this: https://bugzilla.mozilla.org/show_bug.cgi?id=1478597

Correct. toolkit.cosmeticAnimations.enabled is going away. You can set your OS to reduce motion, or set ui.prefersReducedMotion in Firefox.

Comment 6

[alexander.kern]

(In reply to Dão Gottwald [::dao] from comment #5)

Correct. toolkit.cosmeticAnimations.enabled is going away. You can set your OS to reduce motion, or set ui.prefersReducedMotion in Firefox.

Hi, thanks for your comment. I can't find ui.prefersReducedMotion in about:config and if I add it, nothing seems to change. Will the setting come with a newer version? Am I misunderstanding something?

Comment 7

[Dão Gottwald [:dao]]

(In reply to alexander.kern from comment #6)

(In reply to Dão Gottwald [::dao] from comment #5)

Correct. toolkit.cosmeticAnimations.enabled is going away. You can set your OS to reduce motion, or set ui.prefersReducedMotion in Firefox.

Hi, thanks for your comment. I can't find ui.prefersReducedMotion in about:config and if I add it, nothing seems to change. Will the setting come with a newer version? Am I misunderstanding something?

Due to bug 1524874 you need to add the pref as an integer and set it to 1.

Comment 8

[alexander.kern]

(In reply to Dão Gottwald [::dao] from comment #7)

Due to bug 1524874 you need to add the pref as an integer and set it to 1.

That worked, thank you!