Yes, and there are lots of ways they can do it. Web pages are a flexible platform for exchanging information, but that also means it can be easy to track what you're looking at on them. The first method is through third-party content. Say Company A is an advertising or tracking firm. When you visit sites that display A's ads or use A to track their visitors, A can identify your browser and see what pages you visit on those sites (and more).
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