I am trying to add a gmail account on my Thunderbird.

Account Settings > + Add Account > Mail Account > filled in Full Name and gmail e-mail address in Mozilla Thunderbird Account Hub > Continue > Account settings found automatically > Continue > Connect your e-mail settings "Waiting for authorization in login popup..." > website appears on my Brave web browser > Mozilla Thunderbird Email wants access to your Google Account > Select what Mozilla Thunderbird Email can access > Select all > Continue > error appears "This site can’t be reached localhost refused to connect. Try:

Checking the connection Checking the proxy and the firewall ERR_CONNECTION_REFUSED" > Mozilla Thunderbird Account Hub, Connect your e-mail settings page says Waiting for authorization in login popup with spinning circle still there. Any simple, step by step, instructions to get my gmail account added to Thunderbird would be much appreciated. Thank you for your attention to this matter.