[tor-bugs] #3933 [Tor bundles/installation]: Several pref values are getting changed mysteriously from values in prefs.js (was: app.update.auto is getting changed to true in prefs.js)

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#3933: Several pref values are getting changed mysteriously from values in
prefs.js
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 Reporter:  erinn                     |          Owner:  erinn                        
     Type:  defect                    |         Status:  new                          
 Priority:  major                     |      Milestone:  TorBrowserBundle 2.2.x-stable
Component:  Tor bundles/installation  |        Version:                               
 Keywords:                            |         Parent:                               
   Points:                            |   Actualpoints:                               
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Comment(by mikeperry):

 My guess is that it could be as simple as us using user_prefs() instead of
 prefs() in our prefs.js file.

 user_prefs() sets a user value, which may cause Firefox to emit observer
 events for each preference we change in this way. If one of them has an
 exception because the observer for that pref is buggy and/or tries to
 touch some not-yet-initialized piece of Firefox at startup, that could
 easily cause the behavior we see here.

 Also, this issue is not just limited to app.update.auto. People have
 reported issues with formfill options as well.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/3933#comment:1>
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