Passbolt’s extension for Chrome has a shortcut to activate Passbolt as a drop-down, as well as a shortcut to open passbolt in a new tab.
The Firefox addon only has open in new tab. Why not the dropdown? I find that extremely more useful, so i can quickly autofill logins.
I’d even go further and ask for a shortcut to autofill credentials when only one matching entry is found. However, I understand there might be security concerns against that.