Firefox is still freezing when entering incorrect info in the Google Sign-in page (when I try to sign in on www.youtube.com); - if I enter the wronglogin info & press enter, the firefox window becomes useless & I cannot cancel/close the window. & Help menu is greyed-out for the frozen window & any new window I open; - i have to go to macOS' Activity Monitor & Force Quit the 'AuthenticationServicesHelper' (Firefox), then the window becomes responsive. This makes it impossible to use Firefox & if someone didn't know this, they wouldn't know how to fix it. - this has been an ongoing issue & the previous time i submitted this, it was removed for "not being a question" (???) but it still important & I still hope it gets fixed someday?