Is there a method to determine if a link has been visited? In Firefox, the color of a link changes after clicking on it, which leads me to believe it is possible.
Edit: This question pertains to a Firefox extension, so I am unable to modify the HTML or CSS.
Thank you :)
Yes, there is a way to achieve this.
You can create various CSS classes for different styling:
a:visited { color : red; }
a { color : orange; }
After defining the CSS classes, you can detect them using JavaScript.
To ensure that the links do not display in different colors, you have the option of using CSS to make them appear invisible:
a:visited { padding-left: 1px; margin-left: -1px; }
a { padding-left: 2px; margin-left: -2px; }
To differentiate between unvisited (:link) and visited links (:visited), consider assigning different colors to each and then comparing the color of your link with that of the visited link's color.
Regrettably, it is feasible to track visited links, posing a breach of privacy concerns. Recently, I stumbled upon an enlightening blog entry titled Spyjax – Your browser history is not private!, shedding light on this issue.
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