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A comment on Switch your default search engine to Google. Parent comment

Re:Switch your default search engine to Google by pdkl95 on Sunday March 15, 2015 @10:08AM (#9206529)
Private browsing mode and deleting your local history doesn't stop Google from keeping its own log of your searches (and any other Google services (gmail, youtube), and pages with google-analytics, and any page with AdSense, etc)

Google clearly uses these logs to "customize" your search results, even when you check the placebo button to "disable" your history in the google account options.

Not having an account (or deleting local history) doesn't matter much, as they reconstruct a PK from all the entropy your browser leaks. (see their recent "we already ID your browser" reCAPTCHA update that no longer shows a scrambled image)

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Re:Switch your default search engine to Google by githulhu on Sunday March 15, 2015 @11:16AM (#9206743)
This isn't my experience, at least for YouTube. If I'm not logged into Google I only see "recommended for you" video links when I'm not in private browsing mode.

Harder to tell for Google Search - unlike YouTube I never see any indication that search results are based on my history, so any manipulation that's happening is opaque (I never search while logged in, so I don't know if the behavior is different in that case)

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