Because some higher level PDF-related libraries statically embed PDF.js, we recommend recursively checking your node_modules folder for files called pdf.js to be sure.
it's a nice dissection of the bug too, a very cool read.
non-technical folks:
this isn't terrible and most of it doesn't apply to you, but you should update firefox soon if it hasn't updated itself. more details for you here: https://cohost.org/apocryphalmess/post/6056299-for-the-non-technica