index.md

---

title: browserSettings.tlsVersionRestrictionConfig
slug: Mozilla/Add-ons/WebExtensions/API/browserSettings/tlsVersionRestrictionConfig
page-type: webextension-api-property
tags:
  - API
  - Add-ons
  - Extensions
  - Property
  - Reference
  - WebExtensions
  - browserSettings
  - tlsVersionRestrictionConfig
browser-compat: webextensions.api.browserSettings.tlsVersionRestrictionConfig

---

{{AddonSidebar()}}

A {{WebExtAPIRef("types.BrowserSetting", "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

{{Compat}}

Examples

Get the highest TLS version supported by the browser:

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

{{WebExtExamples}}