Hi Tcan, Firefox has settings for default unvisited and visited link colors, the familiar blue and purple, but it doesn't have settings for whether the links are plain, bold, italic, etc, and sites can override underlining and colors.

I think you would need to use an add-on to take control and override website styles. You could search here, although I didn't have good luck with "bold' or "underlined":

https://addons.mozilla.org/firefox/search/?platform=windows&q=color%20links&type=extension

Alternately, you could try using a custom style rule that overrides page styles. Such rules could be applied using an extension like Stylus, or through an optional file named userContent.css. This could give you a more custom look, but takes long to set up, so you might search for a custom-built extension first.

jscher2000, thanks. I tried the colors setting. It succeeds in changing the link color but only if it also forces the background color to change. That is, the way options are set up you can force both background and link colors, but not one or the other. Changing background really alters some pages and curiously block some photos in news pieces from appearing. So not a usable option. The same option screen offered to force links to be underlined but that didn't seem to work. Haven't found an add-on yet. You're right that setting up a custom overriding style is overkill. I'll keep looking.

Note that style rules can cause issues where the link is a clickable (background) image and that links can have other elements nested that have a style set.