Cannot edit game settings in firefox if VTTA - D&D Beyond Integration is enabled

[elporcho]

I know VTTA is a chrome-only extension, and I use it that way. However, when it comes to game time, I play using firefox, since I've had much better performance on my system with it. If I have VTTA - D&D Beyond Integration enabled, then my firefox client cannot use the configure game settings menu. I can open it, and I can click and edit options, but when I click the save button nothing happens, and I cannot close the window. Checking console, I get the following error message (I've removed my IP address for obvious reasons). It only happens the first time I press the save button on the configure game settings menu. This does not happen on chrome, and I would like to continue how I have been, if possible.

Uncaught (in promise) TypeError: Illegal constructor. toObject http://IP:30000/scripts/foundry.js:15039 _getSubmitData http://IP:30000/scripts/foundry.js:5201 _onSubmit http://IP:30000/scripts/foundry.js:5175 activateListeners http://IP:30000/scripts/foundry.js:5124 activateListeners http://IP:30000/scripts/foundry.js:24603 activateListeners http://IP:30000/modules/pings/settings-extender.js:379 _render http://IP:30000/scripts/foundry.js:4462 _render http://IP:30000/scripts/foundry.js:5088 render http://IP:30000/scripts/foundry.js:4404 _onSettingsButton http://IP:30000/scripts/foundry.js:27433 jQuery 9 activateListeners http://IP:30000/scripts/foundry.js:27418 _render http://IP:30000/scripts/foundry.js:4462 _render http://IP:30000/scripts/foundry.js:15633 _render http://IP:30000/scripts/foundry.js:15438 render http://IP:30000/scripts/foundry.js:4404 initializeUI http://IP:30000/scripts/foundry.js:6569 setupGame http://IP:30000/scripts/foundry.js:6474 _initializeGameView http://IP:30000/scripts/foundry.js:7227 initialize http://IP:30000/scripts/foundry.js:6404 async* http://IP:30000/scripts/foundry.js:7359 async* http://IP:30000/scripts/foundry.js:7357