What does "FRBご自由に" mean?

I have seen the sentences above almost everywhere in Japanese artist's profile (Twitter) and I have been wondering what it is. I couldn't find anything when I search on google (in English) but when I change it to search in Japanese, I found out (*´ ˘ `*)♡

FRB stand for フォロー (follow), リムーブ(remove) and ブロック (block)

ご自由に mean 'You're free to'

So, FRBご自由に means You're free to follow, remove and block (me).