By default, links change color when you have visited them. Browser history sniffing compares the link colors of links in your history folder to a master list of links (and their default non-visited colors) maintained by the website operator. A color mismatch indicates a particular site has been visited. Here's how to prevent link color browser history sniffing in Firefox.
Difficulty: Easy
Time Required: Less than 2 minutes
Here's How:
- Open Firefox.
- Click Tools then select Options.
- On the Content tab, click the Colors button.
- Click the Visited Link color and click the same blue that is used for Unvisited Links.
- Uncheck Allow pages to choose their own colors instead of my selections above.
- Click OK to accept the change.
Tips:
- For other privacy tips, see Browser History Sniffing and Other Tracking Techniques