Firefox, the browser that is going to to reach 25% market share soon, is being used by more than 270 million people, according to Asa Dotzler, Mozilla’s director of community development.
How were the calculations done?
As he explains: “The best method we’ve come up with is to count the number of security “pings” we get in one day. (Firefox pings a Mozilla server for security changes about once per day) and multiply that active daily users number by three to get active monthly users. (See John’s blog post for more on this.)”
Although data is not 100% accurate, is can still give you an insight on Firefox users count.