The idea is excellent

This has instantly become one of my favourite extensions.

I wish the metrics page had an 'auto refresh' option, but the fact there is no such option is probably a firefox security limitation.

Best time control addon

Good stuff, just needs more customizability options like other reviewers say like with the idle time out.

it would be great if the user is able to set a reminder for a specific website , also maybe having a black list is easier than adding a ton of usual sites that don't waste time to the white list

Perfect. It would be nice if I would be able to set monitoring time-frame, e.g. 1-V 8-17