What I specifically mean by 'large media elements' is that I currently have the uBlock option active to 'Block media elements larger than [50] KB'. (Where the 50 is a spinner so I can increase or decrease the size if I want.)
I would like to know this, too. It does not seem to be on the list of features unless they are referring to it via "cosmetic filtering". I often block particular elements on websites.
There's also built in blocking under brave://settings/shields for Javascript and social features.
It doesn't have a specific feature to block fonts AFAIK but it does have fingerprint protection if that's your concern.