[tbb-bugs] #13439 [Tor Browser]: Inspector raises the canvas prompt when hovering over images

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#13439: Inspector raises the canvas prompt when hovering over images
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     Reporter:  dcf          |      Owner:  tbb-team
         Type:  defect       |     Status:  new
     Priority:  minor        |  Milestone:
    Component:  Tor Browser  |    Version:
   Resolution:               |   Keywords:  tbb-easy, tbb-usability
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by gacar):

 I just uploaded a new patch. This should allow chrome scripts and PDF.js
 to access canvas without the prompt.

 I built and manually tested patched Tor Browser on a handful of canvas
 enabled sites, it worked as expected.

 The only URL to be whitelisted for PDF.js turns out to be
 `resource://pdf.js/build/pdf.js`. There is a second script
 (`pdf.worker.js`), but it never shows up as a caller, probably because
 [https://github.com/mozilla/pdf.js/#building-pdfjs it's loaded by the
 first one].

 Let me know if anything is wrong with the patch.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13439#comment:11>
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