[FEATURE] Full regular expression of whitelist

[srnyx]

trafficstars

I'm using this extension to only track time spent on 2 websites and I don't care about time spent on any other site

Right now, I have to whitelist every site besides the 2 I want, which is extremely annoying. Instead, I want to be able to add those 2 sites to a blacklist that will be the only 2 sites to be tracked.