Oath isn't a FF software nor Browser so you would have to contact their support and ask what is happening to the connection.

The website might not be compatible with the old Firefox 48 version you appear to use. Maybe try the Firefox 52.9.0 ESR release to see if that works better.

Firefox 52.9.0 ESR:

• https://www.mozilla.org/en-US/firefox/organizations/all/
• https://www.mozilla.org/en-US/firefox/52.9.0/releasenotes/
• https://www.mozilla.org/en-US/firefox/52.9.0/system-requirements/

cbos said

at the end of the taltalk webmail loading the site is changed to https://guce.oath.com/collectConsent etc and webmail is thereby blocked.

Yahoo mail users report the same here in this thread :

https://forums.yahoo.net/t5/Account-security/Cannot-get-past-this-https-guce-oath-com-collectConsent/td-p/499259