Six month ago, I shared our usage statistics for Lightning with you, which showed that Lightning users on Thunderbird 3.x had surpassed Lightning users on Thunderbird 2.x for the first time.
Now it’s time to look at things again and I’m happy to report, that as of yesterday roughly 75% of our users now use a Thunderbird 3.x build as can be seen in the chart below.
It’s also important to note that nearly 60% are already using the latest Thunderbird 3.1.x builds, while users of the old Thunderbird 3.0.x series are decreasing fast. This is mostly due to the major update offers of Mozilla Messaging for users of Thunderbird 3.0.x.
Major update offers have recently (last week) also started for users of Thunderbird 2.x, but haven’t really been unthrottled yet (throttling means, that currently only 1 in 5 users of TB2 gets a major update offer to Thunderbird 3.1.x). Once major update offers go out to every TB2 user, we expect their numbers to decrease much more heavily. The current state of things (showing the last six months) can be seen in the chart below:
As frequently noted in earlier articles, the ratio of Thunderbird 3.0.x and TB 3.1.x users is much higher on the weekends compared to the Thunderbird 2 users. The graphs show that very well.
For those interested: The “other” number contains users on older Thunderbird 1.5.x builds, SeaMonkey users and users, who have mistakenly tried to install Lightning into Firefox. Generally that number always fluctuates between 0.35% and 0.5% of our total active users.
I hope that you will find this as interesting as I do.