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[tor-bugs] #21060 [Applications/Tor Browser]: Disabled SVG should fall back to other image formats



#21060: Disabled SVG should fall back to other image formats
------------------------------------------+-------------------------------
     Reporter:  dcf                       |      Owner:  tbb-team
         Type:  defect                    |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  svg tbb-usability
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 At https://www.bamsoftware.com/papers/fronting/, the figures don't show up
 with the security slider on the "High" setting in Tor Browser 6.5a6.
 Instead, it just shows the alt text:

 [[Image(fig-fronting.png)]]

 The HTML is using the [https://developer.mozilla.org/en-
 US/docs/Web/HTML/Element/picture picture] element to allow fallback from
 SVG to PNG:
 {{{
 <picture>
 <source srcset=fronting.svg type="image/svg+xml">
 <img src=fronting.png alt="A schematic diagram...">
 </picture>
 }}}

 It would be nice if the way Tor Browser disabled SVG was compatible with
 this usage, to allow the browser to try PNG next.

 On the other hand, I see the MDN page says these API are experimental, so
 go ahead and close this if it seems esoteric or unsupported.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21060>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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