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Researchers say they can spy on your browsing by measuring SSD activity through a browser API
(www.tomshardware.com)
This is a most excellent place for technology news and articles.
I've done it with some apps/games by placing the folder in question on a separate drive/partition and using junction points (I use Junction Link Magic, but you can do it manually from command prompt) to basically create a ghost of the folder in the original location that routes everything to the new location.
You could create a small hidden partition just for the browser cache folder to reside on using this method.
Symbolic links for the win!
Replicating this on Linux would be as simple as ln -s to make a symbolic link