Greasemonkey/Tampermonkey Scripts for upload form

I would love to see some scripts for this site where you can input the URL of where an image is for it to grab description, artist, tags, image URL, and more and autofill it. Obviously you would have to edit tags again for sites like FA and InkBunny, but sites like e621 most of the tags have equivalents here.
 
This would NOT be an auto image uploader. You would still have to upload one at a time. It would just take some weight off the clipboard.
 
I know very little scripting otherwise I would do it myself. I know Inkbunny and e621 and derpibooru support APIs, but FA doesn’t but I know there is a way to log into FA via a script maybe using __cfduid. Would love to chat about options!

__cfduid in my mind stands for “CloudFlare device unique ID” and mostly used for analytics purposes, it’s not a session cookie. There’s definitely a way to log into FA since PostyBirb does it somehow, but all in all it’s not easy or even impossible to make requests to an external site from a user script. This may be possible with a browser-level extension that can bypass cross-site request limits but it’s still not an easy feat and would be a nightmare to maintain.