Hi, Same issue here, but I cannot use your solution, because right after I click on the extension's icon to reach the login window, it automatically redirects me to the login success page for one second then close the tab, so I can't see the login page with the checkbox. After the success I'm still logged out. I tried reinstall several times too. I'm experiencing this strange behavior in the last few days, I'm using the latest stable High Sierra release with the latest stable Safari. Any idea?