QuickNote is a simple and useful note taking add-on for Firefox. It can be used to quickly take notes and save them if needed.
Download and install it from here.
After it is installed, the QuickNote icon will show up next to the search bar. Clicking on it opens the notes.
The settings for how these notes are displayed (whether floating, or as a sidebar, or as a new tab) and much more can be configured using the Settings tab.
The default number of notes that are open is 2.
This can be changed from Settings tab. Also, a Save and Clear All icon can be enabled which will appear at the bottom of notes if required.
Other options include customizing font size, font type, color and so on.
To clear all the notes or to save them, click on the bottom icons at the end of notes.
This is a handy add-on that can be used as a scratch pad when browsing websites and trying to take notes.
Happy note taking.