I was looking at this page: https://treeherder.mozilla.org/#/jobs?repo=try&revision=99aad6003e458e83404cb756f9192529e9a50c06 and occasionally (maybe one time per 10, refreshing the page) the visited links on the page are styled without any link styles (i.e., neither :visited nor :link styles). Mousing over the links, to restyle them for :hover, causes them to be styled correctly. To my eye, it looks like the links are initially styled as :link, and then (probably as a result of the async :visited style stuff) get restyled with their plain styles.

This is pretty much what I tried to describe in https://bugzilla.mozilla.org/show_bug.cgi?id=1378275#c4...

I'll add the style gets corrected on hover as seen in this screencast.

Looks like I grabbed this too fast. So far, I can't reproduce the unstyled link issue here. I've been testing with the following URL, which include a few more runs (so more links): https://treeherder.mozilla.org/#/jobs?repo=try&tochange=99aad6003e458e83404cb756f9192529e9a50c06&fromchange=641e3d6dda053a48371484e86530d15b9268333f The links are always either styled as unvisited or visited, but so far I haven't see this unstyled case. I tested on both macOS and Linux, with the same behavior on both. Is it a recent regression? I tested with today's Nightly on Linux, and a few days old tree on macOS.

Nightly 56 x64 20170713100259 @ Debian Testing (Linux 4.11.0-1-amd64, Radeon RX480) I could not reproduce with the URL from comment 4 (the page just loads too long and this may prevent the bug?), but successfully from comment 0 this midday (don't know if it was yesterday's or today's build). As you can see in the video I scrolled a bit down after my test of comment 4 and tried with https://treeherder.mozilla.org/#/jobs?repo=try&revision=7df0135c9fa768c8ea63f4c849560f2de2b34255 -> Hovering the buggy black links, zooming in or resizing the window can make those black links purple (=fix it). At least it can't be bug 1379425 which can't get fixed by those steps. (Thought of the loading circle beside "try".)

(In reply to Darkspirit from comment #5) Very probably I'm wrong, but my perception is that I get more often black visited links if I randomly (or in a cicle) move my mouse in the lower half of the page while pressing F5 again and again.

I could not reproduce it without stylo. Now I tried it with a try build from bug 1371450 comment 13: https://treeherder.mozilla.org/#/jobs?repo=try&revision=2deb83ce288532ce5f2b1534ffe6623b6ad9a9b2 > Linux x64 Stylo opt > tc[tier2] > B > target.tar.bz2 (stylo is enabled by default) And tested the links from comment 0, comment 4 and comment 5 and could not reproduce anymore - so far.

(In reply to Darkspirit from comment #7) > I could not reproduce it without stylo. > > Now I tried it with a try build from bug 1371450 comment 13: > https://treeherder.mozilla.org/#/ > jobs?repo=try&revision=2deb83ce288532ce5f2b1534ffe6623b6ad9a9b2 > > Linux x64 Stylo opt > tc[tier2] > B > target.tar.bz2 (stylo is enabled by default) > And tested the links from comment 0, comment 4 and comment 5 and could not > reproduce anymore - so far. Thanks for testing! Glad to hear this is fixed by bug 1371450.

Can not reproduce in Nightly 56 x64 20170716100258 @ Debian Testing (Linux 4.11.0-1-amd64, Radeon RX480).