Mozilla no longer supports TLS 1.0 and TLS 1.1 encryption protocols in the latest Firefox Nightly release. The move is almost a year after Apple, Google, Microsoft, and Mozilla announced that they will abandon TLS 1.0 and TLS 1.1 in March 2020.
The definition of TLS 1.0 dates back to January 1999, while TLS 1.1 was defined in April 2006 with some improvements to its predecessor. Looking ahead, the site should use TLS 1.2 as defined in August 2008 or TLS 1.3 as defined in August 2018. Browsers no longer support TLS 1.0 and TLS 1.1, which means that users can no longer use these protocols to connect to websites.
According to the latest statistics from SSL Labs, 95.8% of websites support TLS 1.2, while 17.7% of websites support TLS 1.3. This month, the number of sites supporting TLS 1.3 increased by 2.2%, while the number of sites supporting TLS 1.2 increased by 0.2%. Fewer and fewer sites use TLS 1.0 and TLS 1.1, which fell to 0.6% and 0.4% in September, respectively.
So far, since most popular websites support the latest version of TLS, in addition to some industry servers that have not updated the architecture for a long time, the browsing of general Internet users is not expected to encounter too many problems.