Shopify AdminAction extension not working on Arch linux Firefox

[Lubu]

I am trying to make an adminaction extension but it doesn't show up in the more actions menu and I get the blank modal at the bottom. While the exact same code does work on my coworkers mac (not blank and does show up in the more actions menu).

I am currently using VScode (IDE), Arch linux (OS), Firefox (webbrowser) and have tested it on different browsers and OS on my computer using browserstack and I get the same result.