[tor-bugs] #21885 [Applications/Tor Browser]: SVG is not disabled in Tor Browser based on ESR52

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#21885: SVG is not disabled in Tor Browser based on ESR52
-------------------------------------------------+-------------------------
 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:
                                                 |  needs_review
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  ff52-esr, tbb-7.0-must-alpha, tbb-   |  Actual Points:
  torbutton, tbb-security-slider,                |
  TorBrowserTeam201704R                          |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor4
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Changes (by gk):

 * keywords:  ff52-esr, tbb-7.0-must-alpha =>
     ff52-esr, tbb-7.0-must-alpha, tbb-torbutton, tbb-security-slider,
     TorBrowserTeam201704R
 * status:  new => needs_review


Comment:

 We did not backport Mozilla's SVG patch which is using `svg.disabled` but
 switched Torbutton code to observe that one already. Going back to `svg
 .in-content.enabled` fixes that. `bug_21885` in my repo has a fix up for
 review.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21885#comment:1>
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