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Re: [tor-bugs] #3229 [Tor Browser]: Make browser.zoom.siteSpecific memory-only + clearable (was: Make browser.zoom.siteSpecific memory-only)

#3229: Make browser.zoom.siteSpecific memory-only + clearable
-------------------------+--------------------------------------------------
 Reporter:  mikeperry    |          Owner:  mikeperry                    
     Type:  defect       |         Status:  new                          
 Priority:  major        |      Milestone:  TorBrowserBundle 2.2.x-stable
Component:  Tor Browser  |        Version:                               
 Keywords:               |         Parent:  #2871                        
   Points:  1            |   Actualpoints:                               
-------------------------+--------------------------------------------------
Changes (by mikeperry):

  * points:  => 1
  * milestone:  => TorBrowserBundle 2.2.x-stable


Comment:

 Looks like we can easily hack this similar to how we hacked the
 permissions manager to be memory only. SiteZoom, along with an unknown
 additional set of 'content' preferences, is stored in a database
 connection via toolkit/components/contentprefs/nsContentPrefService.js.
 The database connection is created in _dbInit().

 https://developer.mozilla.org/en/XPCOM_Interface_Reference/mozIStorageService

 We can also clear some (but perhaps not all?) items from the content-prefs
 database via removeGroupedPrefs():

 https://mxr.mozilla.org/mozilla-
 central/source/dom/interfaces/base/nsIContentPrefService.idl

 That function should clear the site zoom at least.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/3229#comment:3>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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