Board Thread:Support Requests - Getting Technical/@comment-28465878-20190819030158/@comment-1038387-20190819152124

Mercury is the name of the mobile skin.

A nested table is a table inside another table, for example to collapse one element of a larger table. They're pretty badly parsed on mobile, but should be avoided on Desktop as well.

Some davanced/gimmicky templates require js to function or display properly, but js and css aren't loaded on Mercury, causing them to not work.