If you want to go nuclear you can add OpenDNS to your router and block specific sites or categories of sites. This will work for all devices on your network, an

If you want to go nuclear you can add OpenDNS to your router and block specific sites or categories of sites. This will work for all devices on your network, android, iphone, laptops, etc. Or edit your hosts file and 127.0.0.1 the sites you want to block. To do this on android you have to root or you install Firefox and add Ublock Origin and blacklist the sites you don't want.