browserSettings.tlsVersionRestrictionConfig

A BrowserSetting object used to read the highest and lowest versions of TLS supported by the browser.

The object has these properties:

minimum: The lowest TLS version supported by the browser. Valid values are TLSv1, TLSv1.1, TLSv1.2, TLSv1.3, and unknown.
maximum: The highest TLS version supported by the browser. Valid values are TLSv1, TLSv1.1, TLSv1.2, TLSv1.3, and unknown.

This is a read-only setting.

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`tlsVersionRestrictionConfig`	No	No	72	?	No	No	?	?	79	?	No	?

Examples

Get the highest TLS version supported by the browser:

browser.browserSettings.tlsVersionRestrictionConfig.maximum
  .get({})
  .then((result) => {
    console.log(`Highest TLS version supported: ${result}`);
  });

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https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/browserSettings/tlsVersionRestrictionConfig