"80% of my traffic is bots"
1. Open devtools networking
2. Visit any site with analytics
3. See requests to https://www.google-analytics.com/j/collect?... (for GA), https://plausible.io/api/event (for Plausible) etc
EDIT: expanded this into a post https://jefftk.com/p/firefox-does-not-block-analytics-by-def...
Google is a Mozilla donor and I don't think they'd like it if the browser blocked one of their major services. Ublock Origin will block GA and GTM (Google Tag Manager) however.
Ad blockers also often cut GA off.