I actually build chromium from source for this exact reason, I&#x27;ve gotten it to stop phoning home. It phones home for the following:<p>1. If you are using the Google APIs (see this picture <a href="http:&#x2F;&#x2F;i.imgur.com&#x2F;UodLpFh.png" rel="nofollow">http:&#x2F;&#x2F;i.imgur.com&#x2F;UodLpFh.png</a>) for the browser to have more functionality.<p>2. If you have the &quot;Google account Badge&quot; thingy in the upper right enabled.<p>I don&#x27;t know exactly what in those two causes the phone home, I assume (educated guess here) that it&#x27;s verifying your api keys for browser features such as spell check, that or getting the &quot;Badge&quot; thing setup. While you may be opening a new tab labeled blank that &quot;badge&quot; thing is a pure js&#x2F;html page thats loaded in the background that does need to phone home.