Microsoft edge has two main things that make it stand out above PDF.js to me - the fact that you can make comments and the fact that firefox forces you to go through the file explorer when you want to save PDF annotations. In edge, you just press a button and your changes are saved to the file you opened, no hassle. I read that PDF comments are in the works at the very least but no one seems to be pointing this feature out.
I don't really get why a more straightforward save feature like this hasn't already been implemented because firefox already knows the file path and whether or not changes have been made to the document. If anything, the current method seems more convoluted.
Any way I could somehow automate this process myself would also be appreciated, considering two save buttons might clutter the toolbar.
Also no, this is not an issue with my annotations not being saved, I just don't like the save feature. It's annoying.