When I went to FF 57, I needed a replacement for Reminderfox. This product does the job. It has an option to display in list format which is what I prefer. My only quibble I that it doesn't present all of the Google Calendar options when I add an event. I have to press the button that goes to Google calendar. This is a very minor inconvenience. Google Calendar imported the Reminderfox ICS file perfectly. To get Google Calendar to work almost exactly like Reminderfox you do have to change the Google Calendar option for alarms. Keep up the good work. I will be making a donation today.

Best in it's class. Lots of well thought out options so you configure exactly the way you want. Developer extremely responsive - issues resolved quickly. This isn't one of those extensions that rest on it's laurels and before you know it are showing their age. The entire Checker Plus series of addons are consistently evolving - the developer is always thinking about ways to improve them. The Checker Plus extensions were originally developed for the Chrome browser where they have been very popular for years. This developer took the time and effort to port his extensions early on in the Fx web-extension process. He didn't wait for Fx 57. Highly recommended.

Es muy buena.

Nice!

It works flawlessly on FF stable

Works well and I like that you can one-line input appointments p cool

I am using the chrome calendar extension for 4 years. I am very satisfied with it. With a few clicks you get the information you need and for the input you need just as few clicks. The developer responds quickly to reported bugs!