So I have Firefox 56.0.2 (64 bit) and IE 11. When I attempt to edit a draft email using Firefox, your software tells me I'm using Microsoft Edge. When I switch to IE 11, it tells me I have an older browser and to "upgrade" to IE9. I had to use both browsers just to get my campaign out today (parts in one, parts in the other). Rendering is all borked up. Whatever code changes you pushed in the last week have things really jacked up. I've seen other posts about your QA; please let us know when this will be fixed. I'm coming up on renewal shortly.
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