My bad haha, I've only really been in this thread. I'll branch out. There is a "Save images with embedding in PNG chunks" setting I turned off which seemed to fix the read only attribute issue for some reason, so hopefully others find that information useful. It was in the thread bigelelya posted, so all credit to whoever discovered that :) Thanks for trying to help always
This is running on google server meaning its not using your pc at all, the ram usage is only your browser.