1. Mozilla
  2. Add-ons
  3. Browser extensions
  4. JavaScript APIs
  5. browserSettings
  6. browserSettings.tlsVersionRestrictionConfig

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.

Examples

Get the highest TLS version supported by the browser:

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

Browser compatibility

Chrome
Edge
Firefox
Opera
Safari
Firefox for Android
Safari on iOS
tlsVersionRestrictionConfig
Chrome – No support
Chrome
footnote No support
Edge – No support
Edge
footnote No support
Firefox – Full support
Firefox 72 (Release date: 2020-01-07)
footnote Full support
Opera – No support
Opera
footnote No support
Safari – No support
Safari
footnote No support
Firefox for Android – Full support
Firefox for Android 79 (Release date: 2020-07-28)
footnote Full support
Safari on iOS – No support
Safari on iOS
footnote No support

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Full support
No support

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