Hi Glimfeather, I'm still seeing white-on-blue selections on Windows 7, even on a dark background.

I wonder whether your black-on-yellow (I assume) selections are related to a color scheme picked up from MacOS? Are you aware of any customizations of your system's or your Firefox's color schemes?

No customiasations for any application or macOS. Prefer to get paid work done than waste time fiddling. Firefox has always been default theme. Only changes are ad blockers (AdBlockPlus, Ghostery) to expunge lies from advertisers and prevent exploitation of personal data by Cambridge Analytica and its ilk. The mellow blue should not have been forced onto an otherwise defaulted setup.

Hi, so what happens please when you go to Options --> Language and Appearance and then Colors ? What is the setup use System Colors  ? If use System then Uncheck please. If not select the color you want for then links.

Please let us know if this solved your issue or if need further assistance.

Pkshadow close but no cigar.

Preferences > Languages > Colors and "Override the colors specified by the page with your selections above" is the culprit. The setting was "Only with High Contrast themes" it should have been (and what it was before the 59.0.2 upgrade) "Never". I hate producers who think they know better than me as to what I want. Whoever flipped "Only with High Contrast themes" needs to stop playing around.

Ya, sorry forgot the instructions for getting to that is different in a Mac.

S as to what changed it no idea. Was not Firefox as defaults remain the same as always. It may have been a glitch in a update for Firefox or Mac or the update followed a Mac instruction for your default. If you have a setting in your Mac to use High Contrast it would have followed those instructions.

Anyway am glad you have found the issue.

Please select the Answer that was the Solution for your Issue (yous), Thanks

I think we can now conclude:

• The problem is caused by Firefox 59 following your system theme
• Setting Firefox to not to do that -- "Never" override page styles -- is the workaround

We may never know why there was loss of this setting during this particular update -- I assume it was an isolated issue because you likely would have mentioned if there was a bulk loss of settings as occurs in a Refresh.