Source: Mozilla Add-ons Statistics Dashboard 
Summary
Downloads
Total Downloads (Since Feb. 21, 2008): 876
Last Day Count (Wednesday, Mar. 26): 24
Average Daily Downloads: 27
Downloads in the last 7 days: 242
Active Daily Users
Active Daily Users (On Wednesday, Mar. 19): 179
Change from previous count (40 on Mar. 12): +347.5%
Average Daily Active Users: 58
