User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0

Steps to reproduce:

Update to the current Nightly
Built from https://hg.mozilla.org/mozilla-central/rev/cf48e59e88dec9bd29a53e2ed1a836537a439426

Actual results:

Scrolling on sites has become noticeably choppy with some visual glitches

Expected results:

Scrolling should be as smooth as the previous Nightly version.

A good site to see the bad scrolling is www.majorgeeks.com

I created a new profile and still have the issue. The scrolling is so annoying I'll have to forego Nightly updated until a resolution is found.

Just noticed that my Compositing mode (about:support) with this latest update put me in Basic instead of Webrender where I've always been until now. Can this be the reason for the choppy scrolling?

Lot's of weird stuff contained in the file. Never had these in the prior release.

Decision Log
D3D11_COMPOSITING:
Blocklisted; failure code BLOCKLIST_NVIDIA driver != 26.21.14.4575
DIRECT2D:
unavailable by default: Direct2D requires Direct3D 11 compositing
D3D11_HW_ANGLE:
unavailable by default: D3D11 compositing is disabled
disabled by env: D3D11 compositing is disabled
GPU_PROCESS:
Blocklisted; failure code BLOCKLIST_NVIDIA driver != 26.21.14.4575
WEBRENDER:
opt-in by default: WebRender is an opt-in feature
unavailable-no-angle by runtime: ANGLE is disabled
WEBRENDER_QUALIFIED:
blacklisted by env: No qualified hardware
WEBRENDER_COMPOSITOR:
unavailable by env: No DirectComposition usage
WEBGPU:
disabled by default: Disabled by default

I went back to the previous Nightly and as you can see in my text file I am using Webrender and don't have all those warning messages I have with the latest update version of Nightly.

Problem could be that my graphics card somehow got blacklisted or the like.

Could Bug 1627045 be an issue with my problem?

Perhaps Bug 1626259 is the cause?

(In reply to Gary [:streetwolf] from comment #8)

Perhaps Bug 1626259 is the cause?

Wouldn't affect blocklisting or not. You could use mozregression to narrow down why you started getting blocklisted (assuming you didn't change your driver recently).

Or goto about:buildconfig in the good and bad nightlies and then past the changeset id into

https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange={startid}&tochange={endid}

Replacing {startid} and {endid}

I think Nvidia GPU blocked by Bug 1625857.

Of course. Downgrade your drivers one release should fix it until nvidia releases a fix.

Blocklisted; failure code BLOCKLIST_NVIDIA driver != 26.21.14.4575