[tbb-bugs] #21323 [Applications/Tor Browser]: Activate mixed content blocking

[Tor Bug Tracker & Wiki]

#21323: Activate mixed content blocking
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     Reporter:  arthuredelstein           |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 I'm informed that HTTPS-Everywhere has likely disabled any rules that
 break with mixed content blocking for active content, as suggested in
 https://bugzilla.mozilla.org/show_bug.cgi?id=878890#c20. So I think we
 should activate MCB (set "security.mixed_content.block_active_content" to
 true). It seems dangerous to have it disabled, and Firefox's default value
 is true as well.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21323>
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