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Re: [tor-bugs] #30625 [Applications/Tor Browser]: (without toolbar) the window size is not exact multiple of 100 pixels

#30625: (without toolbar) the window size is not exact multiple of 100 pixels
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 Reporter:  Rick                           |          Owner:  tbb-team
     Type:  defect                         |         Status:  new
 Priority:  Medium                         |      Milestone:
Component:  Applications/Tor Browser       |        Version:
 Severity:  Normal                         |     Resolution:
 Keywords:  tbb-fingerprinting-resolution  |  Actual Points:
Parent ID:                                 |         Points:
 Reviewer:                                 |        Sponsor:
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Comment (by Rick):

 From the moment I read it, I knew it was the DPI setting (fuzzy memory).
 **Both 7.5.6 and 9.0a1 didn't resize properly with a custom DPI setting.**
 There were some patterns to the deviations, but I think these values alone
 may create a unique fingerprint.

 I didn't test and write down all combinations, but I did a lot (not sure
 if there is any value to those notes).

 I found 3 exceptions when testing 9.0a1 @150% DPI.
 With enabled Titlebar + Normal or Compact Density: 1000x600
 With enabled Titlebar, Menubar, and Touch Density: 1000x500

 Otherwise it is just combinations of DPI and UI elements somehow creating
 different values of +- a few pixels.
 Only DPI@100% without the Bookmarks Toolbar delivered correct results on
 9.0a1.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30625#comment:4>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

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