You want to block all content from Google and YouTube, or just particular types of content?

Firefox has features to block cookies on a site-by-site basis, but for other types of content, you probably need to use an add-on.

In a message to me you wrote:

I wish to block ALL content from Google and YouTube, others using the answer as a template. Additionally, blocking particular type of content is on my wish list.

I don't think there are any built-in settings for that kind of block. You probably need to find an add-on: https://addons.mozilla.org/firefox/

Possibly a hosts file. (Remove blank space in link.)

https://en.wikipedia. org/wiki/Hosts_(file)