[bryanlarsen]

Is that a tracker that works even in the presence of AdBlock et al? If not, it's going to significantly undercount Firefox.

[gtk40]

I have a theory that Firefox gets under reported in a lot of stats because its users are more likely to use Adblockers. Statcounter for example is going to be blocked by most Adblockers; stats based on server logs will be more accurate.

[bryanlarsen]

It's not just client side trackers that get blocked -- any server side tracker that only counts specific resources being requested is going to be blocked by Adblockers too.