I worked right next to the engineers who developed the login approvals feature, and overheard the discussions that led to this dialog - it was all about making it hard for people to mistakenly lock themselves out of their accounts because they use frequent cookie cleaners.<p>You can imagine the fallout when someone turns on this feature and then can't get back into their account, or who has to receive a text message every time they log in, even from the same machine/browser.<p>The source code does not call out Chrome in particular - the code looks something like (it also does translation):<p><pre><code> Your current {$browser_name} settings might make it hard to use login approvals.</code></pre>