(Related to T37060.)
[[Special:MyPage]] should preserve the safemode parameter. This would be particularly useful as Special:MyPage/common.css?action=edit&safemode=true , for linking users to if they've accidentally locked themselves out of being able to edit their own CSS or JS. This would allow them to easily remove the accidental CSS/JS bug by themselves, without needing to ask an interface admin or go through the complicated step of turning off their own CSS or JS locally via their browser.