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Bug 42313: Backport MozBug 1865238 (Use One UI Sans KR VF for Korean sans-serif font on Android)

Merge Info

Related Issues



  • Immediate: patchset needed as soon as possible
  • Next Minor Stable Release: patchset that needs to be verified in nightly before backport
  • Eventually: patchset that needs to be verified in alpha before backport
  • No Backport (preferred): patchset for the next major stable

(Optional) Justification

  • Emergency security update: patchset fixes CVEs, 0-days, etc
  • Censorship event: patchset enables censorship circumvention
  • Critical bug-fix: patchset fixes a bug in core-functionality
  • Consistency: patchset which would make development easier if it were in both the alpha and release branches; developer tools, build system changes, etc
  • Sponsor required: patchset required for sponsor
  • Localization: typos and other localization changes that should be also in the release branch
  • Other: usability, see the description


  • Merge to tor-browser - !fixups to tor-browser-specific commits, new features, security backports
  • Merge to base-browser - !fixups to base-browser-specific commits, new features to be shared with mullvad-browser, and security backports
    • NOTE: if your changeset includes patches to both base-browser and tor-browser please clearly label in the change description which commits should be cherry-picked to base-browser after merging

Issue Tracking


Request Reviewer

  • Request review from an applications developer depending on modified system:
    • NOTE: if the MR modifies multiple areas, please /cc all the relevant reviewers (since gitlab only allows 1 reviewer)
    • fonts : pierov. Argh. Assigning to richard as a fallback/to reassign

Change Description

From the upstream bug, it seems that Android 14 on Samsung devices removed the font Firefox used, so it falls back to a font that has a very bad readability for Korean users.

This will change fingerprint for those users, but we don't customize the font list on Android for now, so it might be fine to just take it.

It's a usability improvement, it might sense to Backport. But we haven't had any requests so far, so it might also make sense to just wait.

How Tested

Not tested, but upstream fix that adds an item to the preferences, without removing anything, it seems safe to take.

Merge request reports