Visited Sites do not Change Color

Question

Since the recent Safari upgrade, the sites I have visited do not change color.  For example, if I do a Google search, click the first link and then either use the back button or the refresh button in the Google search field, the site I just visited is not displayed in a different color.  This is happening on other sites as well but not all of them.  Project Gutenberg works as I expected.
Any suggestions on how to fix this?  It makes searching more difficult since I now mentally have to keep track of which sites I've visited.  I realize this problem has cropped up before, but the answers are from several years (and versions) ago.
Thank you in advance for any help you can give me,
Frank

Answer 1

You can use code in userContent.css or use the Stylish extension to override the page colors.
I use code like this:
<pre><nowiki>a:visited {color:#e08!important;background-color:#eee}
a:visited * {color:#e08!important;outline:1px dotted red!important;outline-offset:-1px}
a:visited img {background-color:transparent}
</nowiki></pre>
*Stylish: https://addons.mozilla.org/firefox/addon/stylish/
*http://userstyles.org/help/stylish_firefox
The customization files userChrome.css (user interface) and userContent.css (websites) are located in the <b>chrome</b> folder in the Firefox profile folder.
*http://kb.mozillazine.org/Editing_configuration