Long time user. The app for firefox 57 is not working right. It will not autofill for some of the sites I use and the removal of the ability to copy username and passwords makes it impossible to use on sites that will not autofill. I love the APP but the loss of functionality is upsetting. I hope they fix it soon. I may need to find a new password manager if not fixed. I have been going back and forth with LastPass tech support for 2 weeks nothing value. They keep telling to clear the cache which i do to no avail. LastPass in FireFox does not even let me update any passwords within my vault. Works fine with any other browser I try. Not sure why they are refusing to support the new version of FireFox. Very disappointing..