Board Thread:General Discussion/@comment-25653892-20170613152036/@comment-26923519-20171003120651

Yeah. Most of the complaints, especially at their introduction, were notably about the CSS/JS customization of the page and article headers.

I can understand that JS is not allowed except EraIcons and more items in the Edit dropdown, but I do not really accept that most CSS is restricted from customizing the header(s) site-wide, as most CSS is usually cosmetic and for layout changes.

IMO, the only CSS that shouldn't be allowed is removing the default tabs, removing the "Add New Page" button, the action buttons or the header(s) entirely.