[ BUG ] Does not work on UXP browsers (like Pale Moon and Basilisk)

[OwnedByWuigi]

Browser on which this bug occurs

Other (Specify Below)

Expected Behavior

I expected it to work like at all, even like a CSS mess would be okay

Actual Behavior

Just a blank page, only console output I got is this:

Extra Details

i tested on several UXP browsers (Pale Moon latest, Basilisk latest, and Dactyloidae canary)

[OwnedByWuigi]

Yeah, just a blank screen.