Why not just have multiple Users set in chrome. It makes it easy to have multiple windows open, one for each account, at the same time and I haven't had a problem with it conflicting or crashing yet.
Go to Settings >> Users >> Add new user
Then you'll get an icon in the corner and click on that will allow you to select which account to have a window open for.
Or you can have your account set up for multiple accounts and easily switch between them. I like the multiple users option because it keeps things slightly cleaner but multiple accounts work well too.