[tor-bugs] #6146 [Firefox Patch Issues]: Tor Browser resolution off by 50px sometimes?

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#6146: Tor Browser resolution off by 50px sometimes?
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 Reporter:  mikeperry             |          Owner:  mikeperry
     Type:  defect                |         Status:  new      
 Priority:  major                 |      Milestone:           
Component:  Firefox Patch Issues  |        Version:           
 Keywords:  tbb-fingerprinting    |         Parent:           
   Points:                        |   Actualpoints:           
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Comment(by cypherpunks):

 Sorry for not providing enough info. But I'm sure this is not a personal
 problem. Here are the tests:

 OS: Windows 7 + 1366x768

 I used panopticlick-browserspy and ip-check.info to test my screen sizes.
 (ip-check shows 33 less pixels than the other two)

 '''I did these step by step:'''

 __On fresh Tor Browser install:__
 959x596                       (on ip-check.info 959x563)

 __After restarting Tor Browser or clicking on New Identity:__
 961x600                       (ip-check 961x567)

 __Now enabling the Bookmarks Toolbar:__
 961x574                       (ip-check 961x541)

 __After restart or new identity (bookmarks toolbar still enabled):__
 961x500                       (ip-check 961x467)

 Please make your own tests with the most common operating systems.

 Since Torbutton 1.4.6 I'm seeing very weird screen sizes (especially on
 Windows 7, tested on different computers)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/6146#comment:13>
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