I have searched for an answer to my question, but I can't find one. I have checked the settings in about:config to make sure PDF editing is enabled, and made sure pdfjs.enableHighlightEditor is set to true, and pdfjs.annotationEditorMode is set to 0, but the edit options, like adding a signature, drawing, adding images and adding text are all still grayed out. I'm trying to sign a form, and it's annoying to have to print it out to sign it and then scan and upload it again. I even changed the PDF editing permission to "true" in about:config, thinking that might fix it, but it didn't change anything. I don't understand why nothing is working.