[tbb-bugs] #25166 [Applications/Tor Browser]: Clipboard may be cleared or modified by websites

[Tor Bug Tracker & Wiki]

#25166: Clipboard may be cleared or modified by websites
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     Reporter:  gk                        |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  tbb-proxy-bypass
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 Things like `document.execCommand('copy')` allows websites to mess with
 the clipboard. We might want to think to either warn users when this
 happens or just disable that feature by flipping the `dom.allow_cut_copy`
 preference. See: https://bugzilla.mozilla.org/show_bug.cgi?id=1012662 for
 the original implementation and discussion about exposing the preference.

 Thanks to xiaoyinl who reported that issue in our bug bounty program.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25166>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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