--- a/toolkit/components/extensions/schemas/manifest.json
+++ b/toolkit/components/extensions/schemas/manifest.json
@@ -8,16 +8,21 @@
         "description": "Represents a WebExtension manifest.json file",
         "properties": {
           "manifest_version": {
             "type": "integer",
             "minimum": 2,
             "maximum": 2
           },
 
+          "minimum_chrome_version":{
+            "type": "string",
+            "optional": true
+          },
+
           "applications": {
             "type": "object",
             "optional": true,
             "properties": {
               "gecko": {
                 "$ref": "FirefoxSpecificProperties",
                 "optional": true
               }

new file mode 100644
--- /dev/null
+++ b/toolkit/components/extensions/test/xpcshell/test_ext_manifest_minimum_chrome_version.js
@@ -0,0 +1,13 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+
+add_task(function* test_manifest_minimum_chrome_version() {
+  let normalized = yield ExtensionTestUtils.normalizeManifest({
+    "minimum_chrome_version": "42",
+  });
+
+  equal(normalized.error, undefined, "Should not have an error");
+  equal(normalized.errors.length, 0, "Should not have warnings");
+});

--- a/toolkit/components/extensions/test/xpcshell/xpcshell.ini
+++ b/toolkit/components/extensions/test/xpcshell/xpcshell.ini
@@ -31,16 +31,17 @@ skip-if = os == "android"
 skip-if = release_build
 [test_ext_extension.js]
 [test_ext_idle.js]
 [test_ext_json_parser.js]
 [test_ext_localStorage.js]
 [test_ext_management.js]
 [test_ext_manifest_content_security_policy.js]
 [test_ext_manifest_incognito.js]
+[test_ext_manifest_minimum_chrome_version.js]
 [test_ext_onmessage_removelistener.js]
 [test_ext_runtime_connect_no_receiver.js]
 [test_ext_runtime_getPlatformInfo.js]
 [test_ext_runtime_sendMessage.js]
 [test_ext_runtime_sendMessage_errors.js]
 [test_ext_runtime_sendMessage_no_receiver.js]
 [test_ext_schemas.js]
 [test_ext_schemas_api_injection.js]