[cpeterso]

> I started putting Facebook in another browser

In theory, using a separate browser is not adequate protection from tracking. The Flash Player's "Shared Objects" (aka Flash cookies) are stored in a common directory, so the same Flash data is accessible from any browser running as the same user. I do not believe Facebook's tracking is this nefarious, but the method would be quite easy to implement.

[billiamram]

Disable flash in the browser that runs only facebook?

[ams6110]

I've gone a step further and disabled it across the board.

[chunkyslink]

Relevant. The Evercookie.

http://samy.pl/evercookie/