Notifications don't pop up when full-screen mode is enabled in browser. You can see them after you exit full-screen.

I like the idea of this add-on but it does not seem to work properly yet. After the first 60 minutes it keeps reminding me to take a break instead of reminding me to blink.

Would be nice if it would play a sound, as it it easy to miss the popup.

I found it very useful. Thanks a lot)

Did not work continuously. If I were to minimise my browser for less than a minute, I suppose the timer reset itself and waited another 20mins until notifiying to look away from the screen. Even so, when I had YouTube full screen, the notifs would not show up at all, and I was watching a stream archive for more than 40 minutes. That's worth 2 notifs.
App has good intentions, needs a lot of improvements.

Blink Reminder is great! Reminders appear as a rectangle at the bottom right side of the screen. You can set options for how often it tells you to look away from the monitor, take a break, etc. I love this!