Below are responses from both Microsoft and Google about TLS 1.0 and 1.1.
The Chromium-based Edge browser will lose TLS 1.0 and 1.1 support around July:
For the new Microsoft Edge (based on Chromium), TLS 1.0 and 1.1 are currently planned to be disabled by default no sooner than Microsoft Edge version 84 (currently planned for July 2020).
Other Microsoft browsers will lose TLS 1.0 and 1.1 support around September:
For all supported versions of Internet Explorer 11 and Microsoft Edge Legacy (EdgeHTML-based), TLS 1.0 and TLS 1.1 will be disabled by default as of September 8, 2020.
Remove TLS 1.0 and TLS 1.1
Note: Removal of TLS 1.0 and TLS 1.1 was delayed to Chrome 84, which is expected to ship in July 2020.
TLS (Transport Layer Security) is the protocol which secures HTTPS. It has a long history stretching back to the nearly twenty-year-old TLS 1.0 and its even older predecessor, SSL. Both TLS 1.0 and 1.1 have a number of weaknesses.
TLS 1.0 and 1.1 use MD5 and SHA-1, both weak hashes, in the transcript hash for the Finished message.
TLS 1.0 and 1.1 use MD5 and SHA-1 in the server signature. (Note: this is not the signature in the certificate.)
TLS 1.0 and 1.1 only support RC4 and CBC ciphers. RC4 is broken and has since been removed. TLS’s CBC mode construction is flawed and is vulnerable to attacks.
TLS 1.0’s CBC ciphers additionally construct their initialization vectors incorrectly.
TLS 1.0 is no longer PCI-DSS compliant.
Supporting TLS 1.2 is a prerequisite to avoiding the above problems. The TLS working group has deprecated TLS 1.0 and 1.1. Chrome has now also deprecated these protocols.