When you downloaded LP, you downloaded an installer which when run installed a browser extension for FF. See http://helpdesk.lastpass.com/getting-st ... nstalling/
. This you can see at FF tools>addons>extensions. If you click on the the “more” link for LP and scroll down to the end, you should see that “automatic updates” is selected at “default” (which I presume to be the same as on, since I’ve never changed mine). If for some reason you don’t get an auto update, or you find it necessary to reinstall, you will have to go to the download page and download and run the updated installer. (I think that’s right-maybe someone will correct me.) I suppose you could keep the install file somewhere, but you run the risk of it not being current without checking before reinstall.