Just did a Firefox refresh, not as traumatic as I thought it would be and looked for addons. When I found this addon I was delighted. It fills all my requirements and answers the other problems similar addons haven't addressed. I hope you enjoyed the coffee.

Thank you, finally a notes extension that works as it should! All that's missing is sync and it would be perfect

This is an addon that a lot more users would find useful to use, hopefully it will get known and get the popularity it deserves. The note features of it level up the browser, it works flawless and the developer is very active and responds fast to questions and requests in an amazing level. Thank you for this great addon!

This is really amazing! Settings for the notification with a green button for every circumstance and if set to open with page the notes popup opens with the respective tab: If there is no domain or page not it opens with global, if there is no page but domain note it opens with domain and if there is a page not it opens with that tab.
And it is compatible with Firefox for Android, if you use a Firefox release that allows to install add-ons from a personal collection.
I am honestly impressed.

Шикарное расширение, но есть недоработки:
1. Иногда заметка на странице существует, а индикатор (иконка расширения) не показывает этого - красный цвет. А иногда показывает - зеленого цвета. И приходится всегда, даже когда красного цвета, нажимать на иконку и проверять есть ли заметка на этой странице. Очень не удобно. (Исправлено)
2. При вводе текста на странице и нажатии перевода строки (Enter) происходит перевод строки и моментальное возвращение курсора в исходное положение - как будто были последовательно нажаты две клавиши "Enter" и "Стрелка влево (<-)". Очень не удобно. (Исправлено)
3. Очень не хватает автоматической синхронизации заметок. Я знаю, что об этом уже писали ранее, но я не могу не упомянуть этого.
В остальном расширение очень хорошее. Использую его очень часто.

UPD: всего за сутки разработчиков были исправлены 1 и 2 недоработки. Благодарю!

Excellent design + functionality. Donation sent!

I would like to be able to do two things:

1) format text of my notes (bold & italics would be enough), and

2) create colored highlights on the page itself (but I know that's complicated).

Good. Does what it says on the tin, without drama or complications. Much better than any of the alternatives I tried. Certainly one of the most useful add-ons for me, making Firefox much better to use.

If you could sync through the Firefox profile so that you have the same notes through different computers, it would be amazing. I just noticed that there's such an option in preferences, but it doesn't seem to be working for me.

All notes were wiped after the recent update. Sticky notes do not work at all. The indicator for which pages have notes no longer works.

I guess the new permission required, "Access your data for all web sites", is because of the new memo feature. It's ok, but it would be better as "optional permission"

The pinned notes mode is amazing!

Well made and very useful.

I have problems with firefox, though, so I wish it wasn't a pop-up window. It keeps closing for me, after only a few seconds. It would be so great, if it didn't.