https://www.bleepingcomputer.com/news/software/firefox-63-to-get-improved-tracking-protection-that-blocks-in-browser-miners/

Mozilla developers are working on an improved Tracking Protection system for the Firefox browser that will land in version 63, scheduled for release in mid-October.

Tracking Protection is a feature that blocks Firefox from loading scripts from abusive trackers. It was first launched with Firefox's Private Browsing mode a few years back, but since Firefox 57, released in November 2017, users can enable it for normal browsing sessions at any time.