Firefox 90 introduces SmartBlock 2.0 for Private Browsing
blog.mozilla.orgHow does this feature determine which scripts are required? What if there are dependencies between libraries that are blocked?
Here's some info: https://news.ycombinator.com/item?id=27824587
The dependencies that are known to usually be used by different sites are allowed effectively after you click, while others continue to be blocked. They're only allowed for the site in the URL bar, and other trackers are still blocked.