[Ubuntu, 7.12-RC1] Can't open torrent file from browser

[ichorid]

Ubuntu 22.04
Tribler 7.12-RC1

When trying to open a torrent file directly from Firefox's "Downloads" list, a window with the following text appears:
{'exc_info': (<class 'tribler.gui.exceptions.CoreCrashedError'>, CoreCrashedError('The Tribler core has unexpectedly finished with exit code 2 and status: 0!\nLast core output: \n usage: tribler [-h] [--core] [--gui-test-mode] [--allow-code-injection]\n [--trace-exception] [--trace-debug] [--testnet]\n [--chant-testnet] [--trustchain-testnet] [--tunnel-testnet]\n [torrent]\ntribler: error: unrecognized arguments: /home/bob/Downloads/cool_torrentfile.torrent'), <traceback object at 0x7f68db489580>), 'attachments': []}.

Note the crash happens only when Tribler is closed (i.e. when it should be started automatically when clicking on a torrent file). When Tribler is already running, the torrent is opened correctly.