Last updated on June 23, 2020
According to Mozilla Firefox, their mobile browser is adding an ad blocking feature in their Focus 9.0 update next month (2/12/19). Currently their version of AdBlock only blocks trackers.
As mentioned below, this update will roll out following an A/B experiment meaning 50% will receive the update and the other 50% will not for the first few weeks allowing them to test it out.
As of now, not much more is known about Focus 9.0 other than this new feature is coming which many users will rejoice in having a cleaner browsing experience.