I cant send a comment on mobile site of Facebook

@Lolsen helps if you can provide details like which Android OS you’re using and the specific version of Brave you’re on.

Besides that:

  1. Does it happen if you have Shields off?
  2. Assuming it crashed, can you find crash reports? Instructions to this can be found at Helpful Info & FAQ for Brave Users - #57 by Saoiray