Nice ...
However, for (my) real convenience, I would modify it like this :
a) limit the writing zone to the sidebar ... so to have the web page on the right without switching tabs ... and without using notepad++ and switching from a webpage to notepad++ with CTRL+tab
b) add a shortcut such as F4 to open/close it quickly in the sidebar ...

There is no use to replace NOTEPAD++ within Firefox ... the only real use of such an addon is giving user a chance to write or copy and paste in the sidebar links, snippets of text, etc ...

;-)

good but need features to select the text while browsing and through the context menu we can choose to send to an existing note or send to the new note

One of the best. I wish there were features Edit menu like highlighting and font size in next version.

Simple and no-frills. Works well.

Unfortunately it lacks essential functionalities like import, export and, most glaringly, a search function.

Simple to use. BUT...
Is there a way to extract .tn files to a readable format? I used similiar extrensions before I my experience says that eventually always comes in handy.

I just installed it, but honestly, I love it already. It's just like a little version of Notepad you can keep in the browser, which I think is great. There are oftentimes things I want to save text for that are directly related to the web, so it's handier to keep them in the browser than on my main computer space. I have a feeling I am going to totally love using this. I even like how minimalist it is. The only major thing I would suggest is that it would be cool if you could put it in the sidebar. Once I've actually used it for a while, I'll update this review if I think of anything more to say :)

Good and simple.

*****

And that's okay... :)
Easy to use.
No unnecessary frills.

Win10/64 | FF 57.0b5 (64bit)

My 4-star rating is based on how this app delivers its __current__ feature-set, which it does very well.

Having said that, I think the current feature-set is very basic and find myself wishing for a few more niceties. I have started watching the project on GitHub because i like the app a lot and I do hope that it will continue to get some more features
:)