[tbb-bugs] #12682 [Tor Browser]: Tor Browser's HTML5 canvas fingerprinting dialogue could use a "Revoke" button

[Tor Bug Tracker & Wiki]

#12682: Tor Browser's HTML5 canvas fingerprinting dialogue could use a "Revoke"
button
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     Reporter:  isis     |      Owner:  tbb-team
         Type:           |     Status:  new
  enhancement            |  Milestone:
     Priority:  normal   |    Version:
    Component:  Tor      |   Keywords:  tbb-usability, tbb-linkabillity,
  Browser                |  tbb-firefox-patch
   Resolution:           |  Parent ID:
Actual Points:           |
       Points:           |
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Comment (by isis):

 Replying to [comment:3 isis]:
 > Replying to [comment:2 harmony]:
 > I advised the user to reinstall Tor Browser, but I don't know whether
 there is a more efficient way of doing this.
 >
 > The user ''should only need to restart'' Tor Browser to reset all canvas
 permissions.

 Just tested in stock tor-browser-4.5-alpha-4: "New Identity" and
 restarting the browser (by clicking the `X` and then starting it again)
 both remove any canvas permissions which had been previously saved (even
 if the user selected "Never for this site" in the dropdown canvas
 permission menu).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/12682#comment:5>
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