[dotancohen]

A few years ago I was maintaining the website for a major brand whose products you probably use. To my horror the website did not support Firefox. I gave them a very minimal estimate on what it would cost to support Firefox along with the estimated percentage of Firefox users in their target market. They were not interested.

[robin_reala]

Best to avoid talking percentages, talk the specific cost to fix the bugs vs the specific amount of lost profit.