What does Unknown media type in type 'all/all' mean?
56304
How to remove warnings like `Unknown media type ...`
113563
How to go about determing the System Type of my setup?
12141
Getting "type or namespace name could not be found" but everything seems ok?
12929
How can I determine file type without an extension on Windows?
147942
Where is the HTML5 Document Type Definition?
98904
Replacement of .all() function for Browsers other than IE
8932
What is the difference between "all", "default" and "eth*" in /proc/sys/net/ipv[46]/conf/?
137846
Get the list of all content types
27144
For what security reasons are svgs blocked in the media uploader?
4329
How can I get a overview and manage the default applications for file types?
140156
What default promotions of types are there in the variadic arguments list?
114231
What is the relationship between MIME types and File .extensions?
12958
Allowing all/different file type uploads
126106
What is "%AppData%"?
69894
How to install common media codecs
109210
how do I determine the file type of a video file
90625
Why does update-mime-database complain about uri/rtspt and other unusual types?