How do you keep your main web browser from getting Cluttered with Test Extensions?

Whenever I check out new productivity tools or extensions on launch days I always worry about slowing down my primary browser or messing up my logged in sessions.

I’ve tried creating a secondary user profile specifically for testing side projects but within a few weeks I inevitably end up clicking links in my main window anyway out of habit.

Having a completely separate browser dedicated strictly to sandboxing new tools seems like the only clean way to keep work and testing separate.

Do you maintain a dedicated setup for testing out new software, or do you just install everything directly into your daily driver?