Some combination of apps/platform allows for multi-account management/switching. Proton Mail does that across the board, Proton Drive does that in the browser but not on mobile, Proton Pass allows this on the desktop but not with the browser extension... Considering Proton is a suite of apps, all apps/platform should consistently allow multiple accounts switching/management regardless of the combination of apps/platform... Another similar feedback but product-based: https://protonmail.uservoice.com/forums/953584-proton-pass-authenticator/suggestions/47485043-account-switching-for-browser-extension