First off, I'm a tech-head. I know TOO much about the internet and how it really works... at least, way more than I really want to know.
As a result?
I store NO passwords, ever. I enter them every single time.
Cookies are a privelege - which means, every time a page stores a cookie, I have to give it permission. If a website is a heavy cookie user? I just don't go there, because there's no way any site needs that many cookies.
Pop-ups are also on-by-permission. A few sites use them intellegently (like this one). Most pop-ups are garbage.
I erase history, and cookies, and temp files, on a regular basis.
Do you ever look at "who's on-line" on this forum?
If you do, you'll see the web-crawlers... bing, google, etc. ... scanning through this forum to create links back for their searches. THAT is most likely where the links came from on your search for the purse.
At some point, I'll just "vanish" from this site. Or rather, my current "person" will. I'll just show up as somebody else and start over. Helps confuse the search engines, helps preserve privacy. (but not quite as much fun as having history...)