I don't have access to Vista, IE9 or online CSVs, so it's up to you to test this.
Save the following as Add_CSV.reg and double-click to merge into the registry:
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\MIME\Database\Content Type\application/csv]
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
"Encoding"=hex:08,00,00,00
[HKEY_CLASSES_ROOT\MIME\Database\Content Type\text/csv]
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
"Encoding"=hex:08,00,00,00
For best results reboot once before testing. If it doesn't work, saving and merging Del_CSV.reg will undo the changes:
Windows Registry Editor Version 5.00
[-HKEY_CLASSES_ROOT\MIME\Database\Content Type\application/csv]
[-HKEY_CLASSES_ROOT\MIME\Database\Content Type\text/csv]
You do understand the files are actually downloaded right in either case right? – Ramhound – 2013-02-12T12:30:55.677
@Ramhound, that's a no-brainer. I just want the browser to show the content of the CSV files right in the browser window like it would do with TXT files. – GetFree – 2013-02-12T16:01:23.983