Switching Primary Persona on Web App

[nitrousoxxide24]

Hey everyone,

I was wondering how to change the primary FUT persona on the web app. Everytime I log onto the app, it immediately goes to my secondary account that I don't use anymore, so I have to switch to the other persona manually.  However, since the web app has been buggy at times, I can't log into my current FUT persona without the page crashing. Is there a way that I can designate the other account as the primary one so that it immediately signs into my new primary account instead of making me manually switch in app to it and risk crashing the site on my computer?