The support for the insecure TLS 1.0 and 1.1 protocols will be reenabled in the latest version of Firefox to maintain access to government sites with COVID19 information that haven’t yet upgraded to the new version. In October 2018, all major browser makers including Microsoft, Google, Apple, and Mozilla announced the retirement of the two protocols. Over 850,000 websites are still using the outdated and insecure protocols that expose users to a wide range of cryptographic attacks (1, 2) leading to their web traffic being decrypted.
Source: https://www.bleepingcomputer.com/news/security/firefox-reenables-insecure-tls-to-improve-access-to-covid19-info/