STR: 1. https://fastaim.de/test/ 2. Scroll down to the bottom 3. Hover from the left to the right over these buttons: Youtube, Twitter, Facebook, Steam 4. only with stylo enabled, the text+icon color sometimes remains white or pink. It can be fixed with hovering again the broken button (wait until the transition finished). Code seems to be okay: https://validator.w3.org/nu/?acceptlanguage=&doc=https%3A%2F%2Ffastaim.de%2Ftest%2F Off topic: I have read that xhtml (with a strong Content-Security-Policy) could be processed a bit more performant which could be good for mobile devices, can you confirm this?

This looks like the flickering issue bug 1380133 is fixing... > Off topic: I have read that xhtml (with a strong Content-Security-Policy) could be processed a bit more performant which could be good for mobile devices, can you confirm this? (No clue about where this comes from, nor whether it's true)

Yeah, I only see the flickering issue and confirmed that the patches for bug 1380133 fixed the flicker. I am going to make this as a duplicate of bug 1380133. Darkspirit, please feel free to reopen this if there is another problem in the site. Thank you for testing!

Doh! I've lost duplicate field during midair collision.

Exceptionally I was on Windows now and only had a flickering there. Just to let you know what's happening in my main profile on Debian (comment 0) I uploaded a small video. I will retest when bug 1380133 landed.

It looks like bug 1381431 or bug 1371450 but they have been already fixed..

Both videos are: Nightly 56 x64 20170720100139 @ Debian Testing (Linux 4.11.0-1-amd64, Radeon RX480). This one is with a fresh profile. I'm a bit desperate what differences could be the cause for different behavings. It's not hw acceleration. I have to dig deeper if bug 1380133 doesn't bring the solution.

Summary: icon font = fontawesome, http://fontawesome.io/icon/twitter/ for example The link text (icon font + text) is immediately white if I hover it. With servo disabled, there is a smooth transition from a red text color to a white one. In my main profile, both "icon font" and "regular text" color remain white sometimes. In a fresh profile, only the icon font color remains white sometimes. On Windows, there is some flickering, but not a smooth transition.

OK, I can confirm the white icon on debug build.

According to Cameron's manual testing, looks like this can be fixed by bug 1380133.

Nightly 56 x64 20170724100304 @ Debian Testing (Linux 4.11.0-1-amd64, Radeon RX480). bug 1380133 fixed this partially. This bug still happens with visited links. I hope bug 1383307 will fix this in the next Nightly. (I will re-test.)

If the issue still remains for the visited links, I suspect this might be something related to bug 1381235.

I can confirm that my patch in bug 1381235 can fix the remaining issues in this bug. \o/

This is fixed in the "Linux x64 opt" try build of bug 1381235 comment 14. I tested both unvisited an visited links in a fresh profile with Stylo enabled. All the bugs are dying :)

Verified fixed in Nightly 56 x64 20170729100254 @ Debian Testing. Thank you!