I know it's not actually your fault but YouTube seems to recognize this extension as adblocker and slow down. It's probably because of the InApp blocking function even though I've turned it off. Very sorry you're being screwed by Google

It transmits your personal data such as you private IP address to their server. There's a setting to opt out of this.
2) No indicator how much time spent on a specific host on the add-on icon.

seems like a nice app, but for some reason having this on causes youtube to automatically turn on autoplay every time i switch tabs which is SUPER ANNOYING.

Woke up this morning and it no longer works. All restricted websites were accessible

Good Add-on overall.
Great time-tracking feature.
The blocking feature however is ok but not optimal : it prevents you to use the website you block when you reach the limit if you try to access to it again, however if you stay on the website, you won't be block. (so if you're counting on this add-on to kick you out of netflix or youtube after binging for hours, it won't)