These prefs - and many others - can be placed in a user.js file: https://github.com/yokoffing/BetterFox
I'm deeply saddened that they didn't add a 3.5mm audio/headphone jack.
There was a community poll and I believe a headphone jack was the second-most requested feature after a MicroSD slot.
I appreciate they have to draw a line under the feature set somewhere, however the cost of an audio jack is literal pennies and I'm quite sure the PCB designers could have squeezed it in somewhere.
As someone who has no interest in wireless accessories it makes me unwilling to buy the phone.