There's a myth going around that Firefox blocks analytics providers in its default configuration. For example, in a recent HN discussion 5% of the comments were people asserting it did, and another 5% were people responding to them to assert that it doesn't. To confirm, it doesn't:
You can test this yourself:
Open Firefox
If you've added any extensions create a fresh profile, so you can test the default configuration
Open Developer Tools
Open the Networking panel
Visit a site with analytics (ex:
jefftk.com)Observe pings being sent (ex:
google-analytics.com/j/collect?...)
Firefox does have an "Enhanced Tracking Protection" mode, but it's not enabled by default. Additionally, Firefox users are likely disproportionately blocking ads, which also block analytics scripts.