[tor-bugs] #30304 [Applications/Tor Browser]: Browser locale can be obtained via DTD strings

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#30304: Browser locale can be obtained via DTD strings
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 Reporter:  acat                      |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  High                      |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:  tbb-fingerprinting        |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by acat):

 Updated patch: https://github.com/acatarineu/tor-browser/commit/30304+1.
 Took `PrincipalAllowsL10n` function from the checks for new localization
 system (Fluent) https://hg.mozilla.org/mozilla-
 central/file/c6d806b496845985516cc04342c04988aa1817dd/dom/base/Document.cpp#l1995,
 and applied to DTD URI loads.

 Still, in central applying this will require fixing some things breaking
 due to some internal UI changes, but in ESR60 I did not see anything break
 so far. I think it would be ok to apply, but not sure if we want to wait
 for some progress on the bugzilla before.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30304#comment:4>
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