Rated 5 out of 5 stars

As everyone expected, UnMHT is becoming deprecated. In the meantime, it's still an excellent addon. Its practical successor is probably Save Page WE. Benchmarks against Save Page WE show that UnMHT still has some (occasionally very major) advantages in filesize due to how it groups up multiple references to single resources.

SPWE has some technical advantages in its format, handling of corner cases, and overall structure. Maybe in the future, the gap in filesize between the two addons will be closed.

Rated 5 out of 5 stars

MAF's tendency to corrupt backups is unacceptable, and UnMHT is always perfectly reliable. UnMHT has proper error handling, alerting the user when something can't be saved, while MAF pretends nothing went wrong and destroys your data.

As long as Firefox has non-e10s mode, I will stick with UnMHT. The loss of performance is a pain, but it's worth it to avoid MAF.

This review is for a previous version of the add-on (8.3.0).