[copperx]

I understand, but why does it need filesystem access in the first place?

[dylan604]

so you can upload (er, provide access to) an image of a PCB you are looking to trace

Edit: I should have used a different word than upload. It's just old habit. According to TFA, there is no uploading. All processing is done in the browser, so the app needs local file system access to get at your image

[joemi]

There are other ways for webpages to get file uploads than this particular JS API. I upload files via firefox every single business day as part of my job.

[fc417fc802]

But I can drag and drop (or use the file picker) just fine on other websites.