Generally, this does work especially on YouTube to block all of those annoying ads and other garbage. BUT, it also breaks way too many legit sites especially financial and others that I use all the time. Whitelisting or disabling doesn't seem to work for them and my only solution is to remove the extension. I know it is the installed extension because I can use Chrome without any problem that doesn't have this extension installed on these same sites. I've tried looking around in the extension but the list of things it blocks on many sites sometimes is so long that it's just not worth trying each one to see which, if any is causing the problem. Not to mention I don't like constantly trying banking site logins as their systems could see my attempts as fraud or someone trying to attempt multiple logins who aren't account holders so forget that.....locking my bank accounts just to test this extension isn't worth the hassle. Again, it does what it promises but sometimes having it installed breaks too many legit sites.