See my response above.
However, it sounds like you want to use automatic auto-fill (a.k.a., autofill on page load). For safety reasons, Bitwarden disables this by default. To enable this behavior, go to Settings > MANAGE > Auto-fill in the browser extension. Then check the box for Auto-fill on page load, and change the Default autofill setting for login items to “Auto-fill on page load”.