I really liked LastPass. Started using it almost 2 months ago. In the last few days the Firefox extension auto-updated to some non-functional version and instead of menu dropping down from the icon in the toolbar, it only shows a white triangle in the bar. I use Waterfox now on one PC and have the same happening. I uninstall the extension, go back to LastPass website and install again and it works fine until next auto-update happens.
Fix this! If it is incompatible with some Firefox version, don't push it to install!