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On Firefox, I do have to use the built-in EverSync, but on Chrome I  use the regular EverSync for both. Thing is, I'm doing it right on Firefox, using the built-in, and this is where I'm having the problem. No problems on Chrome.

I received an email in response to this from someone named 
Kuzma Safonov
I sent back a pretty detailed answer and I haven't heard back again.