Do not work recently.

I can see the events anymore after changing my background colour theme. The alerts are starting to be annoying; it should be the defualt push notifications of Mozilla, and least nut not last it was slowing down the startup of the browser. For all those reasons I just stopped using it; I prfer having the Calendar page always open.

when I first used this addon I found it very usefull. Until it started showing notification popups. There was no way to discard them, they kept coming. Apparently I should pay a contribution to get the 'delete' icon turn from grey to black and make it active. So I payed. After that the delete icon disapeared all together. So I got stuck with ongoing notification popups from events allready passed. I reinstalled several times, without result. Then I discarded the thing. I payed for 2 PCs. On both I got the same problem.

Перестало работать (установлена последняя версия расширения)
Показывает какую-то мешанину событий, июнь в феврале и т.п.
После нажатия кнопки "обновить" в панели расширения, вообще практически все события пропали. На весь год осталось штук пять событий
Проблема в режиме Расписание. В остальных режимах все нормально.
---
Начался февраль и расписание исправилось
Какой-то баг у вас в расписании января
---
Stop working (the latest version of the extension is installed)
It shows some hodgepodge of events, June in February, etc.
After clicking the "update" button in the extension panel, in general, almost all events disappeared. For the whole year, there are five events left
Problem in Schedule mode. In other modes, everything is fine
---
February began and the schedule was corrected
Some bug you have in the schedule of January

The extension was promising. Used a different calendar before which was just a mere embed of the google calendar page in a tiny window. I loved that add on because it was simple and it worked. This one on the other hand is slow. I click on something and it takes a half a second or more to to load anything up, and I cant possibly check my events because my calendar is so full that I have to click on "+9 more" or how many events are on that day, but immediately when I move my mouse to click on one of the events, it closes. This doesnt work well and as intended.

I just want a calendar that works with the new firefox update that is quick, easy, and simple, but I guess I cant have that since this seems to be bloated instead of being a simple quick access to my google calendar.

I wouldnt mind all of the bloat if it actually worked and were fast.

EDIT:
So I decided to come back to this. I might have been a little harsh with my original review, but this is the big major issue currently with this addon that frustrates me to no tomorrow. https://i.imgur.com/TO4CJ3Y.gifv

I simply cannot click on the event to edit it. This would be a really nice addon, but there are some big performance issues and bugs that really make me not want to use it.