Statcounter is in the list[0] firefox uses to block trackers, it also seems like Edge use the same list [1], so the 3% is more FF-users who are not using the build in tracking protection
Firefox doesn't block statcounter or other analytics trackers by default. You'd have to go into "Settings > Enhanced Tracking Protection" and change it from "Standard" ("Balanced for protection and performance. Pages will load normally.") to "Strict" ("Stronger protection, but may cause some sites or contact a break.") While I expect Firefox users are much more likely than users of other browsers to do this, I'd also expect a large majority leave settings at the default.
The above poster is right. If you have uBlock Origin, it blocks it by default. I tested the following:
1. Plain install: Not blocked
2. With uBlock Origin: Blocked
3. Strict Enhanced Tracking Protection: Blocked
4. 2+3: Still blocked (unsurprisingly)
I would expect knowledgeable and concerned users (i.e. installing at least uBlock Origin) and people on systems managed by such people (e.g. family members of people in the first group who let that person manage their system) to be a higher percentage of Firefox users than other browsers.
I don't think Firefox has say a 10% share, but I do think that data derived from statcounter.com is going to underrepresent the share of Firefox users. As Google continues to make larger moves to fight ad-blocking, I expect that gap will widen.
Yeah, there’s no way to account for everyone. It’s probably not fair to assume there’s a huge amount of untracked users. And Mozilla cops to the continuing decline as well:
> “Looking back five years and looking at our market share and our own numbers that we publish, there's no denying the decline,” says Selena Deckelmann, senior vice president of Firefox
If statcounter is in the list of blocked trackers, and trackers are blocked by default, then assuming there is a huge list of untracked users is only fair. Because it would be everyone not specifically disabling the tracking protection, which no one does. Statcounter would only count outdated FF installations that also do not use an adblocker (3% seems high for that, but not absurdly high).
Trackers are not blocked by default. You can verify this by visiting https://www.jefftk.com/test/statcounter in stock Firefox, and then again after setting "Enhanced Tracking Protection" to "Strict".
> If statcounter is in the list of blocked trackers, and trackers are blocked by default, then assuming there is a huge list of untracked users is only fair.
Did we see a massive drop in Firefox users when tracking protection was introduced?
[0]https://github.com/disconnectme/disconnect-tracking-protecti... [1]https://disconnect.me/trackerprotection#trackers-we-block