Pretty much every browser except Firefox will break at this stage, as it relies on features and setups not native to most browsers. There’s actually a command line version which works a lot better but it requires node.js, which most users won’t have and (presumably) won’t want to download.
So I’m not sure why you had problems with Firefox locally, that’s where it *should* work best.
Thank you very much for the feedback! I’ll continue to work on it, and hopefully iron out all these inconsistencies 
