martinibuster - 10:10 pm on Apr 26, 2010 (gmt 0)

737,863 weekly downloads

That information does not support the contention that many FF users have adblock installed. The fact is that FF 3.6 has been downloaded at a rate of 30 million users per week. IF you correlate those downloads to the AdBlock download rate, then that works out to a guesstimate of only 2% of FF users are using AdBlock. Before anyone quibbles about that figure, I understand that there is no direct correlation between the two figures. That's why I call it a guesstimate. But it's a lot closer to reality than saying many FF users have an adblocker installed and causing a CTR drop.

AdBlock Plus Statistics
78 million total users.
9 million Active Daily Users on On Sunday, Apr. 25, 2010

AdBlock
10 million total users.
100k active users yesterday.

Here are the statistics:
https://addons.mozilla.org/en-US/statistics

The data is clear. The vast majority of FF users are not using AdBlock. We cannot scapegoat FireFox for a decline in CTR.

[edited by: martinibuster at 10:24 pm (utc) on Apr 26, 2010]