Google Keep Notes brings Google Keep right into your Firefox Sidebar.
Stylish timer combined with stopwatch and alarm for your browser.
Adds a text box to a toolbar button for taking notes
Simple sticky notes utility which provides facility to make small notes of any thing.
FoxClocks shows times around the world - or just your local time - at the bottom of your browser. It deals with daylight saving time so you don't have to.
Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously.
Tomato Clock is a simple browser extension for managing your productivity.
Hydrator reminds you to drink water with a preset time using simple browser notifications!
This add-on helps you to remember to take breaks at regular intervals. You can select from a list of options to receive a notification to stretch up/ go for a walk after every 30 mins, 1 hour, 2 hours or 3 hours.
Healthy Back is your personal assistant who reminds you to sit up straight.