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This is a Firefox support site (which BTW you are using an ancient version of Firefox, update immediately Update Firefox to the latest release).
For your DVD question, https://www.google.com/#hl=en&tbo=d&output=search&sclient=psy-ab&q=how+do+I+format+a+DVD
You may have a corrupted user agent that identifies you as Firefox/3.5.7
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.7) Gecko/20091221 YFF35 Firefox/3.5.7 (.NET CLR 3.5.30729) FBSMTWB
See: