they have.
The only possible drawback is that SearchLock does not work in desktop version of Google Chrome, and it only protects searching queries through Google.
I hope it helps you.

A:

G+
Use Google + privacy settings under Searches tab

A:

Start from turning off google-analytics and referer tracking
You can also turn off the Web History service in Chrome. Incase this service not available, turn off google-analytics 50e0806aeb gasfay
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