Comment 71 for bug 131145

Comment on attachment 534375
Patch 2

@@ +584,5 @@
>> +
>> + // We only support dropping files onto a file upload control
>> + PRBool typeSupported;
>> + types->Contains(NS_LITERAL_STRING("Files"), &typeSupported);
>> + return typeSupported;

> You can also get the file list and check if it's empty.

No, you shouldn't do that during dragover, as it will unnecessarily cause the need to retrieve the data of the drag from the source application which can be slow.