1642973 - Can't disable fullscreen animation

Status: RESOLVED INVALID

(Core :: DOM: Core & HTML, defect)

Description

[emhbuy]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:77.0) Gecko/20100101 Firefox/77.0

Steps to reproduce:

full-screen-api.transition-duration.enter = 0
full-screen-api.transition-duration.leave = 0
full-screen-api.transition.timeout = 0

F11

Actual results:

The toolbar slowly fades away.

Expected results:

Instant transition into full screen. Worked prior to v77.

Comment 1

[Seba S.]

Hi, emhbuy!

Thanks for your contribution!

I could reproduce the described behavior in:

Windows 10 Pro (64-bit)
Firefox Nightly 79.0a1 (2020-06-12) (64-bit)
Firefox 77.0 (64-bit)

I'm not sure if the changes made in about:config are related or if it is expected behavior but I'll add product and component to this issue to keep on track.

Regards,

Comment 2

[Henri Sivonen (:hsivonen)]

dao, is this by design or regressed by bug 1632166 even though the patch there looks like it shouldn't regress this?

Comment 3

[Dão Gottwald [:dao]]

(In reply to emhbuy from comment #0)

Actual results:

The toolbar slowly fades away.

Expected results:

Instant transition into full screen. Worked prior to v77.

Did you have toolkit.cosmeticAnimations.enabled = false set? If so, we now honor prefers-reduced-motion instead: https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-reduced-motion#User_preferences

Comment 4

[emhbuy]

(In reply to Dão Gottwald [::dao] from comment #3)

(In reply to emhbuy from comment #0)

Actual results:

The toolbar slowly fades away.

Expected results:

Instant transition into full screen. Worked prior to v77.

Did you have toolkit.cosmeticAnimations.enabled = false set? If so, we now honor prefers-reduced-motion instead: https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-reduced-motion#User_preferences

I do have toolkit.cosmeticAnimations.enabled = false set and still see the fullscreen animation.

Comment 5

[Dão Gottwald [:dao]]

As I said we don't support that pref anymore.

Comment 6

[emhbuy]

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

As I said we don't support that pref anymore.

Sorry, I misunderstood. I was able to use the settings in your link and I have successfully disabled the fullscreen animation.