| 50 || all Extensions marked "multiprocessCompatible" and all WebExtensions [1]
|-
| 51 || all Extensions and all WebExtensions [1], [2], [3], plus 770 add-ons testing in Beta that were not marked either way (initial expansion)
|-
| 52 || as in 51 [2], [3]
|-
| 53 || as in 52 All add-ons not specifically marked MPC=False [2], [3]
|}