[tor-bugs] #16607 [Tor Browser]: Allow SVG for extensions, even on "high" security level

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#16607: Allow SVG for extensions, even on "high" security level
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     Reporter:  mbauer       |      Owner:  tbb-team
         Type:  defect       |     Status:  needs_information
     Priority:  normal       |  Milestone:
    Component:  Tor Browser  |    Version:
   Resolution:               |   Keywords:  tbb-usability
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by mbauer):

 I created a sample addon, including two resource-pages using inline svg.
 Installing the addon opens a new tab, that links these pages. Source is
 attached. https://www.dropbox.com/s/ycj8vva7u3cg5c4/svg-testaddon.zip?dl=0

 Actually, you should be aware of issue #16495. It describes a problem that
 crashes Tor Browser on pages that include svg elements, if the security
 level is set to high. The first page is small enough to not crash the
 browser, but the second page will (that's my current graphic). According
 to #16495, the crash is caused by the svg blocking code.

 For the whitelisting idea: Maybe you should apply it to the page that
 wants to include svg. If a !resource:// page includes svg, it's fine, if a
 !http:// page includes svg from an addon resource, it would still be
 blocked.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16607#comment:4>
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