[tor-bugs] #25147 [Applications/Tor Browser]: Backport of fix shipped in Firefox 58.0.1?

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#25147: Backport of fix shipped in Firefox 58.0.1?
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 Reporter:  gk                        |          Owner:  pospeselr
     Type:  task                      |         Status:  needs_review
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  TorBrowserTeam201803R     |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by gk):

 Okay, I applied the patch as-is to `tor-browser-52.6.0esr-8.0-2` (commit
 3eb8f10e0c16c52a1d586e190e82009041535503) and after looking at the code a
 bit more I pushed a fixup (commit
 b6bc1f1a802dc93620219faeb2f65e2afc78b83c) to take the `browser.js` changes
 into account which mcs pointed out.

 I leave this ticket open until Richard has checked everything mentioned in
 comment:8. I think we can file an additional bug for checking whether
 there are things in esr52 that should be patched as well but are not
 available anymore on mozilla-central/mozilla-release.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25147#comment:9>
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