And I actually agree with you...
Of course the next highest child is then always the next most agreed upon counter argument since they should reply instead of downvote, which can make HN feel a bit contrary but full of good discourse
If you only ever use chat in the browser, you only see messages when you actively check it. With the app installed, you get a giant bubble that you can't ignore for every message. FB wants to be the messenger that people respond to immediately.
For me, I actually like the messenger bubble UI, and love that it's not built as a gateway to the massive time sink of the rest of Facebook. But I think it's clear that omnipresence is the goal here, and we have no reason to believe that it won't become a funnel to the rest of Facebook in the future.
https://developers.google.com/web/updates/2015/03/push-notif...
But it also has Identity, Contacts, SMS, Phone, and a host of others. Do not want.
Btw: that works with mobile Firefox. (I originally used it instead of chrome, mostly because it supports ad blocking on unrooted devices.)