Firefox 19 : how to filter uploaded files by type?
How can I get a file upload control in Firefox to only allow .xlsx files? I already have specified "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" as the accepted type (I'm using Rails so using the file_field_tag element).
The above filter works fine on Chrome, but doesn't seem to have any effect in Firefox.
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