Explanation for those.

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On my userContent.css, I specify link colors. Mostly 'coz I like blue for unvisited, purple for visited. Which doesn't always fit with a page's background colors (dark blue for nav bars is epidemic). Experimenting with changing BG/FG colors turned out to be less than optimal (though I've got a black-on-white.css for pages which are utterly unreadable). And some sites (Slashdot IIRC) were hiding links as same color as text w/ no underlines. So I bolded links and did the hover/click thing as feeback. I find it a very useful cue. Also helps me know (when getting laggy response on a remote-X connection) when I'm actually on an active link.

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What's your issue with it? Distracting? As a non-typical response, I could see that. Of course, it's the sort of thing you can turn off with your own userContent.CSS ;-)