My personal list of blocked domains on my FRITZ!Box 7490
It was created to block many mobile/smartphone In-App ads, annoying website ads and Skype ads.
apps.skype.com may disable some functions in Skype desktop!
Just login to your FRITZ!Box and you can find your Blacklist under the tab Lists.
Copy&Paste the text into your Blacklist and click on save.
Simply delete everythig you added from this list in your list.
These instructions are not made by AVM.
And just to make sure
(aka I don't know what should go wrong with blocking some websites out of your network but someone will probably mess something up):
Usage at your own risk!