Re: [tor-bugs] #31917 [Applications/Tor Browser]: Investigate shipping bundled fonts on Android

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#31917: Investigate shipping bundled fonts on Android
--+--
 Reporter:  sysrqb|  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal| Resolution:
 Keywords:  tbb-mobile|  Actual Points:
Parent ID:  #18097| Points:
 Reviewer:|Sponsor:
--+--

Comment (by sysrqb):

 Copying from ticket:31881#comment:1
 > It seems like we should take note of
 [https://bugzilla.mozilla.org/show_bug.cgi?id=998844#c8 comment 8]:
 > {{{
 > This is already possible on Android and Firefox OS, where font files in
 the "font"
 > sub-dir of a profile are loaded on startup:
 > http://dxr.mozilla.org/mozilla-
 central/source/gfx/thebes/gfxFT2FontList.cpp#1266
 > }}}
 >
 > [https://dxr.mozilla.org/mozilla-
 central/source/gfx/thebes/gfxFT2FontList.cpp#1115
 gfxFT2FontList::FindFontsInOmnijar] is a slightly more helpful function
 (from FF32). This was implemented in
 [https://bugzilla.mozilla.org/show_bug.cgi?id=878674 Bug 878674].
 >
 > This is the current location: https://searchfox.org/mozilla-
 esr68/source/gfx/thebes/gfxFT2FontList.cpp#1079
 >
 > {{{
 >   static const char* sJarSearchPaths[] = {
 >   "res/fonts/*.ttf$",
 >   };
 >   RefPtr reader = Omnijar::GetReader(Omnijar::Type::GRE);
 >   for (unsigned i = 0; i < ArrayLength(sJarSearchPaths); i++) {
 > nsZipFind* find;
 > if (NS_SUCCEEDED(reader->FindInit(sJarSearchPaths[i], ))) {
 >   const char* path;
 >   uint16_t len;
 >   while (NS_SUCCEEDED(find->FindNext(, ))) {
 > nsCString entryName(path, len);
 > AppendFacesFromOmnijarEntry(reader, entryName, aCache,
 jarChanged);
 >   }
 >   delete find;
 > }
 >   }
 > }}}

 We can use this as a defense against font fingerprinting.

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[tor-bugs] #31917 [Applications/Tor Browser]: Investigate shipping bundled fonts on Android

[Tor Bug Tracker & Wiki]

#31917: Investigate shipping bundled fonts on Android
--+
 Reporter:  sysrqb|  Owner:  tbb-team
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:
Component:  Applications/Tor Browser  |Version:
 Severity:  Normal|   Keywords:  tbb-mobile
Actual Points:|  Parent ID:  #18097
   Points:|   Reviewer:
  Sponsor:|
--+
 In #31881 we found the correct method for shipping bundled fonts in Tor
 Browser on Android.

 1. Do we need to ship bundled fonts?
 1. Which fonts should be ship?
 1. How do these impact apk size?
 1. How does this impact language support?

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