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[tor-bugs] #5293 [TorBrowserButton]: Keep an eye on Battery API

#5293: Keep an eye on Battery API
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 Reporter:  mikeperry         |          Owner:  mikeperry                    
     Type:  task              |         Status:  new                          
 Priority:  normal            |      Milestone:  TorBrowserBundle 2.3.x-stable
Component:  TorBrowserButton  |        Version:                               
 Keywords:                    |         Parent:                               
   Points:                    |   Actualpoints:                               
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 Firefox 10 added a battery API that is off by default:
 https://developer.mozilla.org/en/DOM/window.navigator.mozBattery

 Battery properties such as exact capacity, charge rate, and drain rate can
 provide fingerprinting information.

 It looks like the current API does not provide exact capacity, but charge
 rate and drain rates can be calculated. Probably not a big deal, but it
 should be trivial to obfuscate/discretize with Object.defineProperty if we
 need to.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5293>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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