I use Firefox/Opera, in that order, wondering if cookies from FF can track Opera, vice/versa. Or does this question have to many variables for a simple answer (i.e. depends on cookie/browser/system/config.'s/)? Any input appreciated 
no ;D they use completely separate profile folders where cookies are stored, together with cache etc….
on a side note: some common tracking files that I know of are those saved to disk by Adobe Flash Player for instance >>> the folder there is common to all browsers (Macromedia). For those interested, this will change soon in Chrome (plugins running in sandbox - Chrome sandbox).
Alright, thanks
I actually prefer my cookies dunked in milk that way they don’t disturb the people listening to Opera.
The Firefox usually gets to my cookies before I get a chance to dunk them. ;D ;D
LOL… 
asyn
+1
The Fox is not involved though.