[tbb-bugs] #27290 [Applications/Tor Browser]: WebGL is broken in Tor Browser 8

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#27290: WebGL is broken in Tor Browser 8
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 Reporter:  gk                              |          Owner:  tbb-team
     Type:  defect                          |         Status:
                                            |  needs_revision
 Priority:  High                            |      Milestone:
Component:  Applications/Tor Browser        |        Version:
 Severity:  Normal                          |     Resolution:
 Keywords:  ff60-esr, TorBrowserTeam201809  |  Actual Points:
Parent ID:                                  |         Points:
 Reviewer:                                  |        Sponsor:
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Changes (by gk):

 * keywords:  ff60-esr, TorBrowserTeam201809R => ff60-esr,
     TorBrowserTeam201809
 * status:  needs_review => needs_revision


Comment:

 Surprisingly, this does not fix the issue for me. First of all, flipping
 that pref alone is not enough. We seem to set that pref in Torbutton as
 well
 (https://gitweb.torproject.org/torbutton.git/tree/src/chrome/content/torbutton.js#n1517)
 and it is clobbering the value again. But even with that fixed I can't get
 the demos on http://webglsamples.org/aquarium/aquarium.html to run.

 Here is what I did on my Linux box:
 1) Extract a new 8.5a1
 2) Patch the omni.ja file in Browser/browser according to your patch
 3) Patch Torbutton and copy it over to the extracted browser
 4) Start 8.5a1 for the first time
 5) Check that the value in `about:config` is okay (it was)
 6) Go to http://webglsamples.org/aquarium/aquarium.html

 One nit: s/was use for this purpose/was used for this purpose/

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27290#comment:6>
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