I was using another channel blocker that blocked all the channels I added but was causing my home page to jump. I uninstalled that extension and added this one. This one is really convenient. You simply click the red X to the left of the channel name, BUT...this extension does not block the channels selected despite telling you that the channel had been blocked AND this extension does not allow you to block Mixes. Useless. I uninstalled it after only a couple of hours.