Hi Mozilla, i stumbled upon an extension called 'unhook' which allows to hide a wide selection of content from my view on youtube. This is amazing! Now I can watch my favourite channels without annoying stuff on every side. I would really appreciate to have something of this kind as a native feature in Firefox. So please consider this a suggestion right away or point me towards the place where I can suggest this feature correctly - if there is such. Thanks a lot for Firefox!