According to neowin reports, Mozilla canceled support for TLS 1.0 and TLS 1.1 encryption protocol in the latest Firefox Nightly version. And before that, Apple, Google, Microsoft and Mozilla have decided to cancel will be support for TLS 1.0 and TLS 1.1 in March 2020.
TLS 1.0 protocol established in January 1999, and TLS 1.1 Ze established in April 2006, 1.1 compared to 1.0 made some improvements. Browser is no longer supported TLS 1.0 and TLS 1.1, it means that users can no longer use these protocols connected sites. When complete cancellation of major technology giant company after TLS 1.0 and 1.1 support, will be used TLS 1.2 or August 2018 of TLS 1.3 in August 2008 definition.
According to SSL Labs latest statistics, there are 95.8% of the site supports TLS 1.2,17.7% of the site supports TLS 1.3. In September this year, the number of sites to support TLS 1.3 and 2.2 percent, the number of sites to support TLS 1.2, an increase of 0.2%. TLS 1.0 and TLS 1.1 is used on the site are decreasing, down 0.6% and 0.4% respectively in September. So far, the most popular sites already support the latest version of TLS.
If you want to know what has been done to change the site, by the latest Firefox Nightly test version.