Description

When installing https://stopdonaterussia.com/ as a PWA, installation fails during system integration with:

Failed to install system integration: Failed to store web app icons: Failed to get the first letter

The website name is #StopDonateRussia. It looks like the icon fallback/monogram generation tries to use the “first letter” of the app name, but # is not treated as a valid letter, so the process fails.

Steps to Reproduce

1. Open Firefox (Fedora, GNOME).
2. Go to https://stopdonaterussia.com/.
3. Install it via PWAsForFirefox (standard install flow).
4. Installation fails with the error above.

Additional Information

• Site name shown/used: #StopDonateRussia
• Hypothesis: monogram/fallback icon generation expects an alphabetic first character; # causes “first letter” extraction to fail instead of skipping punctuation and using the next alphanumeric character (S), or falling back to a default icon.
• Expected behavior: ignore leading punctuation (#) and use S, or use a generic fallback icon without failing the install.

Affected Websites

• https://stopdonaterussia.com/

Environment

• Operating system: Fedora (latest/stable)
• System architecture: x86_64
• Desktop environment: GNOME
• Installation method: Fedora RPM (Firefox)
• PWAsForFirefox extension version: 2.18.0
• PWAsForFirefox native version: 2.18.0
• Firefox version: 147.0.3 (64-bit)