Really close to canceling my LastPass subscription over their abysmal Firefox support. Add-on constantly logs me out, requiring me to find my (well-hidden, extremely complex) master password in my file system to log back in. When it actually is working, it works poorly: fails to detect log-in fields in many website, and -- whether due to some sort of paid arrangement with Google or simple incompetence -- does not provide the option of copying the password to the clipboard from the LastPass icon as the in Chrome extension. Instead, you have to open a new tab to edit the login info, click to make the password visible, and copy it manually. Unacceptable.