[tbb-bugs] #22137 [Applications/Tor Browser]: Provide the same scrollbar size across different platforms

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed Feb 6 09:59:36 UTC 2019

#22137: Provide the same scrollbar size across different platforms
 Reporter:  gk                             |          Owner:  tbb-team
     Type:  defect                         |         Status:  new
 Priority:  High                           |      Milestone:
Component:  Applications/Tor Browser       |        Version:
 Severity:  Normal                         |     Resolution:
 Keywords:  tbb-fingerprinting-resolution  |  Actual Points:
Parent ID:  #18283                         |         Points:
 Reviewer:                                 |        Sponsor:

Comment (by gk):

 Replying to [comment:8 Thorin]:
 > Georg, I have been using the solution outlined in
 https://bugzilla.mozilla.org/show_bug.cgi?id=1397996#c2 for over year,
 flawlessly. These are the original authors. I don't know about this new
 one (which looks like a modified version or copy), but the one I've used
 has a menu item to turn it on/off - so you'd probably need to remove that
 (I guess).
 > FYI: There will also be a test for this at
 - under `[scrollbar width] os` when added (soon), which incorporates
 detection of zoom (which is required to correctly calculate the scrollbar
 width if zoom is not 100%)


 I think what we need to figure out in this ticket first is the approach we
 want to take to solve this issue. I am not a huge fan of shipping some
 `userChrome.css` etc. if we have the option to easily patch the browser
 ourselves (which we have) as patching seems less complex and error-prone
 to me and we want to upstream the fix to Firefox anyway. (That way
 everyone can benefit.) The easiest and sufficient solution might still be
 to just give a fixed value, say 17px, back for all platforms.

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22137#comment:9>
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