[tor-bugs] #30542 [Applications/Tor Browser]: pinch-to-zoom viewport vs other screen/window

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#30542: pinch-to-zoom viewport vs other screen/window
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 Reporter:  Thorin                               |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-fingerprinting, tbb-mobile,      |  Actual Points:
  tbb-parity                                     |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by tom):

 Ah so this is basically the Visual Viewport I just emailed about,
 suggesting we don't care about this.

 The user behavior of zooming and panning can, in theory, give fairly good
 confidence that User A is *not* User B - because User A zoomed to 150% and
 User B zoomed to 200%.  But to suggest that User B and USer C are the same
 because they both zoomed to approximately 200% - even if they panned in
 similar ways - seems waaaaaay too guessy to be a concern.

 I'll also note that on Desktop, I don't beleive we stop the user from
 zooming in on a webpage which is essentially the same thing.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30542#comment:7>
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