Re: Facebook cookies/merchant notification?
I suspect that event was triggered by a relatively new program called Facebook Retargeting.
To counteract such things I have my browser set to automatically clear all cookies when I close it. And I close the browser several times a day; anytime I think there is a chance of info ‘leaking’ between websites.
Then just before I shut off the computer each night, I run a free program called CCleaner to clear all temp files, cookies, can other junk files. Amazingly there are over 20MB every night.
I hope this helps.