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Font/text issue with self-upgrade window

🐞 Bug Report

Self-upgrade popup can have a font/text issue, cf. screenshot below.

Screenshot

Screenshot_From_2025-10-30_19-53-03

Reproduction steps

Upgrade from 14.8.0 to 15.0 with the self-upgrade system with Linux build.

Expected behaviour

Text should be displayed correctly

Actual behaviour

Text issue on the popup.

Bookkeeping

  • Browser version: From 14.8.0 to 15.0
  • Browser channel:
    • Release
    • Alpha
    • Nightly
  • Distribution method:
    • Installer/archive from torproject.org
    • tor-browser-launcher
    • homebrew
    • other (please specify): Initially https://aur.archlinux.org/packages/tor-browser-bin (so Tor project binaries) but at some point upgrades started to be done with TB's self-upgrade (didn't fixed AUR's rename)
  • Operating System:
    • Windows
    • macOS
    • Linux
    • Android
    • Tails
    • Other (please specify):
  • Operating System Version: ArchLinux (rolling release)

Browser UI language

English

Have you modified any of the settings in about:preferences or about:config? If yes, which ones?

No (and N/A)

Do you have any extra extensions installed?

No

Troubleshooting

Two very similar ArchLinux setups, both running on GNOME and very similar setup, but issue only happened onto one of them curiously. The one with the issue got this problem for the first time: every previous upgrade was showing correctly.

Does this bug occur in a fresh installation?

No

Is this bug new? If it is a regression, in which version of the browser did this bug first appear?

As explained above, it appeared for the first time in more than 2 years of upgrades on this setup.

Does this bug occur in the Alpha release channel?

Does this bug occur in Firefox ESR (Desktop only)?

Does this bug occur in Firefox Rapid Release?


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