Hi all I a trying to add my Yandex account to thunderbird but I cannot get it to work. I activated application password in my yandex account so that part is covered. The problem comes when logging in through Thunderbird, it opens a browser window for me to login, the problem is that because of cookie settings it doesn't let me go forward in that authentication (see attachment). I guess the yandex website requires certain settings to work because it rejects my login. Because of this I cannot make it work. I tried changing th default browser for Thunderbird but the settings in mac does't seem to help. I changed the settings from the below to TRUE but still cannot open the page in another browser network.protocol-handler.warn-external.http network.protocol-handler.warn-external.https Any ideas on how to go around this? Thank you in advance!