1939286 - Consider shipping missing fonts to users

Status: ASSIGNED

(Core :: Privacy: Anti-Tracking, enhancement, P3)

Description

[Fatih Kilic [:fkilic]]

To prevent font fingerprinting we limit the fonts available, but that only works if the font is actually available. If the font is in the list, but is missing, then we leak information. To prevent this, we can ship missing fonts with viable licenses to users.

Comment 1

[Fatih Kilic [:fkilic]]

Attachment: WIP: Bug 1939286: Implement FontFace::GetMissingFonts (chrome-only). r?tjr

Comment 2

[Fatih Kilic [:fkilic]]

Attachment: WIP: Bug 1939286: Implement MissingFontInstaller. r?tjr

Comment 3

[Fatih Kilic [:fkilic]]

Attachment: WIP: Bug 1939286: Implement ActivateFPPSupplementalFonts for OSX. r?tjr

Comment 4

[Fatih Kilic [:fkilic]]

Attachment: WIP: Bug 1939286: Implement ActivateFPPSupplementalFonts for Linux. r?tjr

Comment 5

[Fatih Kilic [:fkilic]]

Attachment: WIP: Bug 1939286: Implement loading of supplemental fonts on Windows (Part 1: gfxDWriteFontList). r?tjr

Comment 6

[Fatih Kilic [:fkilic]]

Attachment: WIP: Bug 1939286: Implement loading of supplemental fonts on Windows (Part 2: gfxGDIFontList). r?tjr

Comment 7

[Fatih Kilic [:fkilic]]

Attachment: WIP: Bug 1939286: Implement nsRFPService::GetFPPSupplementalFontsDir(). r?tjr

Comment 8

[Fatih Kilic [:fkilic]]

Attachment: WIP: Bug 1939286: Add font loading test. r?tjr

Comment 9

[Fatih Kilic [:fkilic]]

Attachment: WIP: Bug 1939286: Implement FontFace::NotifyUpdatedFonts. r?tjr