On one of my laptops, and only one of them of all the devices I use.... I try to log into LastPass via the firefox plugin and it asks me to verify the device via email. I do it, by reading my email, clicking the link and "thank you for verifying your device" message... I can not log in on the laptop.... but say I boot the computer the next day or latter that day.. it asks me to do it all over again.. ever single time I log in.