An extension to block as many sites as you want
BlockSite is a popular extension for blocking websites. They used to block as many sites as you wanted for free, and had other paid content, but now you have to pay to block more than 6 sites. So I built Eyeshade in about 4 hours to replicate the only functionality of BlockSite I used to use (having an on/off switch to block a list of websites). I was bothered that BlockSite put their most basic functionality behind a paywall after I'd been using it for years. There are probably a dozen extensions that do this better than Eyeshade in its current state, but hey, it gets the job done for me.