Full Answer

Firefox Enhanced Tracking Protection takes a fundamentally different approach to privacy than Safari's Intelligent Tracking Prevention. Where Safari uses machine learning to classify and restrict trackers dynamically, Firefox relies on the Disconnect list — a curated, publicly auditable blocklist of known tracking domains.

The blocklist approach has advantages and limitations. The advantage is transparency: any domain owner can check whether their tracking endpoints appear on the list and understand exactly what Firefox blocks. The limitation is coverage: new trackers that have not yet been added to the Disconnect list pass through unblocked until the list updates.

In Standard mode — the default for all Firefox users — Enhanced Tracking Protection blocks social media trackers, cross-site tracking cookies in all windows, cryptominers, and fingerprinting scripts. First-party cookies remain unrestricted, which means analytics tools like GA4 that set first-party cookies continue to function normally in Standard mode.

Strict mode significantly increases blocking scope. All third-party cookies are blocked regardless of whether they appear on the Disconnect list. This breaks some website functionality — login flows that depend on cross-site cookies, embedded content from third-party domains, and some payment processors that use cookie-based session management.

For WooCommerce tracking specifically, Firefox's Standard mode has minimal impact on properly configured server-side tracking. The GA4 tag and Meta Pixel may be blocked if their domains appear on the Disconnect list, but server-side event delivery to these platforms bypasses Firefox's blocking entirely because the requests originate from the store's server, not the visitor's browser.