This has been a constant annoyance for me for a few weeks (since I switched to Nightly), but for what it's worth, Lastpass says they'll have a WebExtension vers

This has been a constant annoyance for me for a few weeks (since I switched to Nightly), but for what it's worth, Lastpass says they'll have a WebExtension version out by the time Firefox 57 is officially released (2017-11-14).