THis extension working in Flarum 1.2.0 ?

[intopes]

Hello Dem!

This extension working in Flarum 1.2.0 ?
Have possible to change the name of label for other in the admin panel?

I have similar code I view in this thread some months ago but now I update to Flarum 1.2 version and this resource not working for me I view in this thread :

div.PostStream div.PostStream-item:not(:first-child) article.CommentPost.Post.Post--by-start-user .Post-header h3:after { content: "Author"; background: #F05D1D; border-radius: 4px; padding-left: 10px; padding-right: 10px; color: #fff; margin-left: 14px; }

Maybe possible working you extension code without install the pluglin? Only via Custom CSS in admin?

Many thanks.