I'm not looking for a way to synchronize cookies between browsers, this has been answered here.
I'd like to know, if Chrome could read/write Firefox's cookies, with or without me realizing. (Or any other combination of browsers...)
Is this, maybe, prohibited by some OS-mechanism? Firefox itself could hardly protect its cookies, while not running...
Would there be a way to detect this?
How could I make sure, that Firefox-Cookies are not read by Chrome and added to my Google profile? Is it enough to use Firefox for websites, that I don't want in my Google history? (e.g. banking...)