AMO Editor Timeify от Noitidart

How this works is, every 10 seconds it checks all your tabs. If it finds any time that is open on a review page it will increase the time in the log.

https://addons.mozilla.org/*/editors/review/* for example - https://addons.mozilla.org/en-US/editors/review/stop-it

It keeps timing even when the tab is not focused, this is because often time I download and diff the stuff offline.

If you want me to add "file/browse" pages I can do that, but right now it doesn't consider tabs at like:
https://addons.mozilla.org/*/firefox/files/browse/*/file/*

Log is kept for every day. However right now it filters out and only shows you for the current week. The week starts on Sunday at 00:00 (12:00 AM) and ends on Saturday at 23:59 (11:59 PM).

If you want to leave a tab open on review pages, then "disable timer" so it doesn't keep counting. You shouldn't leave tabs open on review pages though unless you are working on it. As per email blast sent earlier this year.