Bug 41436: Fixed handling of settings array

Pier Angelo Vendramerequested to merge
pierov/tor-browser:bug_41436 into tor-browser-102.4.0esr-12.0-2

They were using a newline as a splitter, rather than repeating the key. Also, improved the logging to be more useful.

Finally, linted again and switched from a new Array to [].

Closes #41436 (closed).

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