Useful addon.

Exactly what I was looking for! Thanks!

Fantastic! Even before unlocking the extra features by donating I've found this extension to be the best thought out of ANY extension I have ever used. Jason thinks like a user, not like a coder. It's obvious this software was designed for function and form FIRST, then coded to make what makes the most sense, WORK. Too many extensions and free softwares are coded without enough thought to how end users actually think and use things. When you tell them about issues they tell you you're using the software wrong. WRONG. Mr. Savard, you are a model developer all others should be required to learn from.

fantastic addon :D
An option to start the week at Monday would make it 6/5 :p

the Best add ons!

I love this extension! Lets me quickly see if there's an upcoming event & clicking on it opens my calendar. That's all I need!

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