Highlight color setting

Bonjour

Introduction, please read, contributors guide on Firefox advanced customization with css https://support.mozilla.org/en-US/kb/contributors-guide-firefox-advanced-customization

A similar discussion thread https://support.mozilla.org/en-US/questions/1609524

If you wish to test userContent.css

Hello,

I created the Chrome folder, and created the userContentcss.txt file. I've attached as well. Closed and reopened Nightly. No change.

Bonjour

Similar support https://www.userchrome.org/how-create-userchrome-css.html

Alternately, if you have some CSS code ready to paste into a userChrome.css file, you can do that using the following page and download your userChrome.css file from there: Generate Downloadable userChrome.css File. https://www.userchrome.org/download-userchrome-css.html

Generate CSS file userContent.css

Thanks for your advice, I just did what you showed and still no change. Can you do a Microsoft Quick Assist session to see for yourself?

A Microsoft Quick Assist session, no. And see my answer modified