diff --git a/browser/components/enterprisepolicies/PoliciesValidator.jsm b/browser/components/enterprisepolicies/PoliciesValidator.jsm
index 46a7bb43acd6..dbcd4d80f615 100644
--- a/browser/components/enterprisepolicies/PoliciesValidator.jsm
+++ b/browser/components/enterprisepolicies/PoliciesValidator.jsm
@@ -43,6 +43,7 @@ function validateAndParseParamRecursive(param, properties) {
     case "integer":
     case "string":
     case "URL":
+    case "URLorEmpty":
     case "origin":
       return validateAndParseSimpleParam(param, properties.type);
 
@@ -143,10 +144,16 @@ function validateAndParseSimpleParam(param, type) {
       break;
 
     case "URL":
+    case "URLorEmpty":
       if (typeof(param) != "string") {
         break;
       }
 
+      if (type == "URLorEmpty" && param === "") {
+        valid = true;
+        break;
+      }
+
       try {
         parsedParam = Services.io.newURI(param);
         valid = true;
diff --git a/browser/components/enterprisepolicies/tests/browser/browser_policies_validate_and_parse_API.js b/browser/components/enterprisepolicies/tests/browser/browser_policies_validate_and_parse_API.js
index f28de7d2e5bf..a0dc6445e57b 100644
--- a/browser/components/enterprisepolicies/tests/browser/browser_policies_validate_and_parse_API.js
+++ b/browser/components/enterprisepolicies/tests/browser/browser_policies_validate_and_parse_API.js
@@ -99,11 +99,39 @@ add_task(async function test_URL_values() {
   is(parsed.pathQueryRef, "/foo#bar", "pathQueryRef is correct");
 
   // Invalid values:
+  ok(!PoliciesValidator.validateAndParseParameters("", schema)[0], "Empty string is not accepted for URL");
   ok(!PoliciesValidator.validateAndParseParameters("www.example.com", schema)[0], "Scheme is required for URL");
   ok(!PoliciesValidator.validateAndParseParameters("https://:!$%", schema)[0], "Invalid URL");
   ok(!PoliciesValidator.validateAndParseParameters({}, schema)[0], "Invalid value");
 });
 
+add_task(async function test_URLorEmpty_values() {
+  let schema = {
+    type: "URLorEmpty"
+  };
+
+  let valid, parsed;
+  [valid, parsed] = PoliciesValidator.validateAndParseParameters("https://www.example.com/foo#bar", schema);
+  ok(valid, "URL is valid");
+  ok(parsed instanceof Ci.nsIURI, "parsed is a nsIURI");
+  is(parsed.prePath, "https://www.example.com", "prePath is correct");
+  is(parsed.pathQueryRef, "/foo#bar", "pathQueryRef is correct");
+
+  // Test that this type also accept empty strings
+  [valid, parsed] = PoliciesValidator.validateAndParseParameters("", schema);
+  ok(valid, "URLorEmpty is valid");
+  ok(!parsed, "parsed value is falsy");
+  is(typeof(parsed), "string", "parsed is a string");
+  is(parsed, "", "parsed is an empty string");
+
+  // Invalid values:
+  ok(!PoliciesValidator.validateAndParseParameters(" ", schema)[0], "Non-empty string is not accepted");
+  ok(!PoliciesValidator.validateAndParseParameters("www.example.com", schema)[0], "Scheme is required for URL");
+  ok(!PoliciesValidator.validateAndParseParameters("https://:!$%", schema)[0], "Invalid URL");
+  ok(!PoliciesValidator.validateAndParseParameters({}, schema)[0], "Invalid value");
+});
+
+
 add_task(async function test_origin_values() {
   // Origin is a URL that doesn't contain a path/query string (i.e., it's only scheme + host + port)
   let schema = {