zlacker

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.

You can test behavior on this tracker here: https://www.jefftk.com/test/statcounter

replies(1): >>LeifCa+V5

>>jefftk+(OP)
Thanks for the tester, on Firefox I just see:

    <html><head></head><body><img src="https://statcounter.com/" vt9kpu8nj="">
    </body></html>

but uBlock Origin with default settings blocks the image.

replies(1): >>jefftk+r8

>>LeifCa+V5
Looking in the browser networking panel is probably the easiest way to see whether it actually sends a request.

replies(1): >>jmholl+9o

>>jefftk+r8
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.