Is ixbrowser the best browser for managing multiple accounts securely?

ixbrowser is def a solid choice for multi-accounting, but I get what you mean about the clunkiness. Have you tried clearing the cache regularly? It helped speed things up for me.

If you're looking for alternatives, check out Multilogin. It’s pricier but way smoother and more secure. ixbrowser is great for the price tho, so it depends on your budget.