diff --git a/devtools/client/storage/test/browser.ini b/devtools/client/storage/test/browser.ini
index 43888242486e..636b3fdce38a 100644
--- a/devtools/client/storage/test/browser.ini
+++ b/devtools/client/storage/test/browser.ini
@@ -31,6 +31,7 @@ tags = usercontextid
 [browser_storage_cache_error.js]
 [browser_storage_cookies_delete_all.js]
 [browser_storage_cookies_domain.js]
+[browser_storage_cookies_domain_port.js]
 [browser_storage_cookies_edit.js]
 [browser_storage_cookies_edit_keyboard.js]
 [browser_storage_cookies_tab_navigation.js]
diff --git a/devtools/client/storage/test/browser_storage_cookies_domain_port.js b/devtools/client/storage/test/browser_storage_cookies_domain_port.js
new file mode 100644
index 000000000000..a5bc2e5beedc
--- /dev/null
+++ b/devtools/client/storage/test/browser_storage_cookies_domain_port.js
@@ -0,0 +1,29 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* import-globals-from ../../framework/test/shared-head.js */
+
+"use strict";
+
+// Test that cookies with domain equal to full host name and port are listed.
+// E.g., ".example.org:8000" vs. example.org:8000).
+
+add_task(function* () {
+  yield openTabAndSetupStorage(MAIN_DOMAIN_WITH_PORT + "storage-cookies.html");
+
+  yield checkState([
+    [
+      ["cookies", "http://test1.example.org:8000"],
+      [
+        getCookieId("test1", ".test1.example.org", "/browser"),
+        getCookieId("test2", "test1.example.org", "/browser"),
+        getCookieId("test3", ".test1.example.org", "/browser"),
+        getCookieId("test4", "test1.example.org", "/browser"),
+        getCookieId("test5", ".test1.example.org", "/browser")
+      ]
+    ],
+  ]);
+
+  yield finishTests();
+});
diff --git a/devtools/client/storage/test/head.js b/devtools/client/storage/test/head.js
index 0db162add63d..1664443949ee 100644
--- a/devtools/client/storage/test/head.js
+++ b/devtools/client/storage/test/head.js
@@ -22,6 +22,7 @@ const DEBUGGERLOG_PREF = "devtools.debugger.log";
 const CACHES_ON_HTTP_PREF = "dom.caches.testing.enabled";
 const PATH = "browser/devtools/client/storage/test/";
 const MAIN_DOMAIN = "http://test1.example.org/" + PATH;
+const MAIN_DOMAIN_WITH_PORT = "http://test1.example.org:8000/" + PATH;
 const ALT_DOMAIN = "http://sectest1.example.org/" + PATH;
 const ALT_DOMAIN_SECURED = "https://sectest1.example.org:443/" + PATH;
 
diff --git a/devtools/server/actors/storage.js b/devtools/server/actors/storage.js
index 0f20bd0a805d..c80252239ff6 100644
--- a/devtools/server/actors/storage.js
+++ b/devtools/server/actors/storage.js
@@ -492,7 +492,7 @@ StorageActors.createActor({
       return host == null;
     }
 
-    host = trimHttpHttps(host);
+    host = trimHttpHttpsPort(host);
 
     if (cookie.host.startsWith(".")) {
       return ("." + host).endsWith(cookie.host);
@@ -742,7 +742,7 @@ var cookieHelpers = {
       host = "";
     }
 
-    host = trimHttpHttps(host);
+    host = trimHttpHttpsPort(host);
 
     let cookies = Services.cookies.getCookiesFromHost(host, originAttributes);
     let store = [];
@@ -878,7 +878,7 @@ var cookieHelpers = {
       opts.path = split[2];
     }
 
-    host = trimHttpHttps(host);
+    host = trimHttpHttpsPort(host);
 
     function hostMatches(cookieHost, matchHost) {
       if (cookieHost == null) {
@@ -2418,7 +2418,12 @@ exports.setupParentProcessForIndexedDB = function ({ mm, prefix }) {
 /**
  * General helpers
  */
-function trimHttpHttps(url) {
+function trimHttpHttpsPort(url) {
+  let match = url.match(/(.+):\d+$/);
+
+  if (match) {
+    url = match[1];
+  }
   if (url.startsWith("http://")) {
     return url.substr(7);
   }