I had it happen yesterday with Halo: The Master Chief Collection, except it was with Chrome, not Firefox.
Yup just doing the first 'boss' type quest and its health keeps resetting to max
Same issue here. Health would go down and then the moment the target wasn't my focus any longer, health jumped back to max.
Also noticed if you alt-tab out to use the editor, it works the first time, but alt-tabbing out again will cause all options to fail and the trainer to lose connection to the game.
Great job on getting it out so fast, as usual!
00:14:43: Horizon Zero Dawn Complete Edition, 08-07-2020 (STEAM/EPIC)
00:14:43: Checking for updates failed...
00:14:48: Successfully attached to HorizonZeroDawn
00:14:49: Collect Unlimited Health, Script error in line 6: Cannot find aob for 'Unlimted_Player_Health'
00:14:56: Successfully attached to HorizonZeroDawn
00:14:57: Collect Unlimited Health, Script error in line 6: Cannot find aob for 'Unlimted_Player_Health'