Keeping minimized applications in the same order

I often use multiple browser instances to separate different kinds of work. So rather than having 20 tabs open, I'll have 4 instances open, a different one for each job, each with 5 tabs. I might also have excel and word open.

When I minimize them, the always minimize by putting the most recently minimized last in line. Is there a way to keep them in the same order so I always know which instance is for which job?