Firefox extension!?

Question

Mozilla Firefox

Salute, Habralyudi! I'm looking for an extension with the following features:
- selection from the main content page, like in Reader
- the ability to edit the text inside and highlight
- the ability to save it all in pdf and / or in the browser
Why do I need all this? To keep the most useful of the articles read on your computer, and, most importantly, leave and highlight in these articles only the most necessary.
To summarize: you need something like a text editor inside firefox. If anyone knows/uses this add-on, please respond!

Answer 1

Previously, for these purposes, I used ScrapBook , you can read it here .
But then I switched to Office OneNote.

Answer 2

ScrapBook is just great! Thank you so much, this is what I was looking for!