4000 Weeks

Very nice and minimal! I like that you can switch between life, year, month, and day. Has not given me any problems at all. I wish there was an option to customize the colors and to not display "Change Birthday" once that has been set. Other than that, this extension is great!

As simple at it is - the best plugin out of all that I have. It helps me to constantly keep top of the mind the fact that my time on this earth is limited and in turn encourages me to not waste on frivolous things - just like the magnanimous book of the same name:)