Just registered. I seem to be able to add keywords, but can't find a way to remove keywords or edit the frequency of notifications. I've tried disabling uMatrix

Just registered. I seem to be able to add keywords, but can't find a way to remove keywords or edit the frequency of notifications. I've tried disabling uMatrix for the site, but that doesn't seem to help. Is it just some weird config with my browser or is that the way it's meant to be?