The rendered list on the right hand side of https://docs.saltstack.com/en/latest/ref/states/all/salt.states.cmd.html looks really weird when I view it with the recommended WebRender settings from https://mozillagfx.wordpress.com/2017/11/27/webrender-newsletter-10/. That page also causes the FF tab title text to disappear while it's active; when I switch to another tab, all of the tab titles reappear.

Nightly 59 x64 20171128100440 de_DE 5b33b070378ae0806bed0b5e5e34de429a29e7db @ Debian Testing (KDE, Radeon RX480) fresh profile: layers.acceleration.force-enabled, gfx.webrender.enabled, gfx.webrender.blob-images, image.mem.shared WFM. Could you make a screenshot and copy/upload the output of about:support afterwards? Thank you.

This was taken on the 11/28 macOS nightly.

Interesting, I don't repro it either in 11/28 macOS nightly with those prefs set. Do you have any other prefs set?

According to your about:support there don't seem to be any other relevant prefs. But you have a different graphics card than I do, maybe that's the difference.

I can reproduce this on my machine. Disabling the box-shadow declarations in the "#sidebar-nav > ul > .current" rule makes the glitch go away. This is an inset box-shadow with a 1px blur radius on an element with a height of 9706px. box-shadwo: inset 0 1px 1px rgba(0,0,0,.05)

https://bugzilla.mozilla.org/attachment.cgi?id=8933009 First regression: 2017-10-18: The locationbar got a big grey shadow. (But even before this date that box can get black when zooming in.) mozregression --good 2017-09-15 --bad 2017-11-29 --pref "layers.acceleration.force-enabled:true" "gfx.webrender.enabled:true" "gfx.webrendest.enabled:true" "gfx.webrender.layers-free:true" "gfx.webrender.blob-images:true" "image.mem.shared:true" > 10:20.48 INFO: Last good revision: 65fe9a60d39dc8ddfdf805a3ffc8a217da638cab > 10:20.49 INFO: First bad revision: 882e0b30bc0eaed2d78bee279e51b67e6ee6bbbf > 10:20.49 INFO: Pushlog: > https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=65fe9a60d39dc8ddfdf805a3ffc8a217da638cab&tochange=882e0b30bc0eaed2d78bee279e51b67e6ee6bbbf > Kartikaya Gupta — Bug 1408461 - Update webrender to commit 7892f5364bc4d35c7a9b42949f0ace4cc54f8b3c. r=jrmuizel Second regression: 2017-11-17. Assuming the first regression is "good". "Bad" is when there are colorful/random things inside the box, or when the tab text or back button are blank. If unsure, open a new tab, switch back and press F5. mozregression --good 2017-11-10 --bad 2017-11-29 --pref "layers.acceleration.force-enabled:true" "gfx.webrender.enabled:true" "gfx.webrender.blob-images:true" "image.mem.shared:true" > 9:26.24 INFO: Last good revision: ef9858e9ad38718eea180a62bb5b65561ad57d91 > 9:26.24 INFO: First bad revision: cdf4bb1c6af6e53643d2beb0f10a2ce29207ff5e > 9:26.24 INFO: Pushlog: > https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=ef9858e9ad38718eea180a62bb5b65561ad57d91&tochange=cdf4bb1c6af6e53643d2beb0f10a2ce29207ff5e > cdf4bb1c6af6 Kartikaya Gupta — Bug 1417062 - Update for API change in WR PR 2043. r=nical > 72cfd88fe0a0 Kartikaya Gupta — Bug 1417062 - Update reftest annotations for changes in WR PR 2031. r=nical > c80c224d6b0c Kartikaya Gupta — Bug 1417062 - Update webrender to commit d490a74c438d987122c600afca6bb2247ab38637. r=nical

I filed this as https://github.com/servo/webrender/issues/2135

I can no longer reproduce this problem.