Greasy Fork镜像

How to delete friends after selecting checkboxes?

I've installed the script and now have checkboxes next to friends' names, however, after selecting the friends I want to 'unfriend', I don't know how to confirm and proceed with the deletion? This is the first time using scripts, so I'm not sure if there's something I'm not doing correctly? Thanks.

I'm also stuck on this one.

Please refresh a page to appear as options.