[tor-project] New Tor Metrics graph: Tor Browser downloads and updates

[Arlo Breault]

> On Jan 27, 2017, at 12:33 PM, Yawning Angel <yawning at schwanenlied.me> wrote:
> 
> On Fri, 27 Jan 2017 16:15:41 +0100
> Karsten Loesing <karsten at torproject.org> wrote:
>> - hellais asked at yesterday's Vegas meeting: "how many times does a
>> normal tor browser do an update ping every day?" which was answered by
>> mikeperry and gk with "twice" "and on every start".  This is probably
>> something we should clarify in the graph description.
> 
> If the definition of "update ping" is fetch the JSON file at:
> `extensions.torbutton.versioncheck_url`, then their comments don't
> match what I saw in the code...
> 
> https://gitweb.torproject.org/torbutton.git/tree/src/chrome/content/torbutton.js#n808
> 
>  const kMinSecsBetweenChecks = 120 * 60; // 2.0 hours

Probably, `app.update.interval`
https://gitweb.torproject.org/tor-browser.git/tree/browser/branding/official/pref/firefox-branding.js?h=tor-browser-45.7.0esr-6.5-1#n9