Add the option for the last account used on a url to be remembered the active account for that tab is only changed while it is the active tab. Auto switch to the remembered account when navigating to the tab or url.

I am often doing things with multiple accounts and have historically used multiple browser instances to manage this, with frame changing accounts now does so for both browsers and all open urls. It's quite cumbersome to keep swapping back and forth between two accounts and it's also easy to make mistakes if doing similar things across those two wallets.