Can't use file picker on Firefox Dev edition 70.0b macOS 10.11.6

I hope this is the right place to post.
I couldn’t use the native filepicker for uploading a file on userinyerface.com .
Everytime Firefox crashed or froze.
Firefox Dev edition 70.0b, macOS 10.11.6

you mean when clicking here?

it does work for me

Yes, I’m talking about this. I don’t think it’s related to the site though

It does it on other sites still in 72.0b so…

I guess that’s a bug, it still does it everywhere in 72.0b @Nicolas_Chevobbe

does it fail if you open a new tab and paste data:text/html,<meta charset=utf8><input type="file"> in the url bar?

Could you file a bug on https://bugzilla.mozilla.org/ ? This is not DevTools related, so we should ask Firefox engineer what’s going on.