I have established an account with Gmail, which I can access through my web browser(Firefox). I have added Thunderbird to my PC. The same settings have been applied to each system. Thunderbird cannot connect to Gmail. It keeps asking me for my password, which I reenter. It tells me that it's wrong. I know it's correct since I can connect, using that password, to Gmail via Firefox. What am I doing wrong? Thanks, in advance, for your help.