With most recent update of Firefox, there is no longer an option for "sites" in the LastPass add on - you have to open your full vault to launch a site or search on the add on instead of clicking with the mouse. This means letting go of the mouse and having to type until you find the site and then either clicking via arrows on the keyboard - which does not highlight the chosen site clearly enough or go back to the mouse to click. These are needless steps and causes user-unfriendly delay. Go back to the previous design.