Icon created by --register-app is non-functional

🐞 Bug Report

Reproduction steps

1. On a supported Chromebook, enable the Linux (Crostini) environment.
2. Download the latest official Tor Browser for Linux (.tar.xz package).
3. Extract the archive in the user's home directory.
4. Navigate into the tor-browser directory in the terminal.
5. Run the command ./start-tor-browser.desktop --register-app.

Expected behaviour

• Clicking the icon created by --register-app in the ChromeOS launcher should successfully start Tor Browser.

Actual behaviour

• An icon for "Tor Browser" correctly appears in the ChromeOS app launcher.
• However, clicking this icon does nothing. No process appears to start, and no UI feedback is given (no loading spinner).
• The application can be started successfully by running ./start-tor-browser.desktop directly from the terminal.

Bookkeeping

• Browser version: 14.5.5
• Browser channel:
  • Release
  • Alpha
  • Nightly
• Distribution method:
  • Installer/archive from torproject.org
  • tor-browser-launcher
  • homebrew
  • other (please specify):
• Operating System:
  • Windows
  • macOS
  • Linux
  • Android
  • Tails
  • Other (please specify): ChromeOS
• Operating System Version: 138.0.7204.163

Browser UI language

en-US

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

No

Do you have any extra extensions installed?

Troubleshooting

Does this bug occur in a fresh installation?

yes

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

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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