Which one exactly? There are multiple "Black Panther" themes by that author, at least one of which *does* have a space in the file name, too.
Bug 1548776 Comment 15 Edit History
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Which one exactly? There are multiple "Black Panther" themes by that author, [at least one of which](https://addons.mozilla.org/de/firefox/addon/black-panther-by-m-donna/) *does* have a space in the file name, too.