diff --git a/browser/base/content/tabbrowser.js b/browser/base/content/tabbrowser.js
index 9eaa59d07a74..eebc9e90f41b 100644
--- a/browser/base/content/tabbrowser.js
+++ b/browser/base/content/tabbrowser.js
@@ -116,7 +116,7 @@ class TabBrowser {
       "resumeMedia", "mute", "unmute", "blockedPopups", "lastURI",
       "purgeSessionHistory", "stopScroll", "startScroll",
       "userTypedValue", "userTypedClear", "mediaBlocked",
-      "didStartLoadSinceLastUserTyping"
+      "didStartLoadSinceLastUserTyping", "audioMuted"
     ];
 
     this._removingTabs = [];
@@ -1965,7 +1965,7 @@ class TabBrowser {
       let setter;
       switch (name) {
         case "audioMuted":
-          getter = () => false;
+          getter = () => aTab.hasAttribute("muted");
           break;
         case "contentTitle":
           getter = () => SessionStore.getLazyTabValue(aTab, "title");
diff --git a/browser/base/content/tabbrowser.xml b/browser/base/content/tabbrowser.xml
index 75c156416f11..36059e3dd041 100644
--- a/browser/base/content/tabbrowser.xml
+++ b/browser/base/content/tabbrowser.xml
@@ -1847,11 +1847,6 @@
         <parameter name="aMuteReason"/>
         <body>
         <![CDATA[
-          // Do not attempt to toggle mute state if browser is lazy.
-          if (!this.linkedPanel) {
-            return;
-          }
-
           let tabContainer = this.parentNode;
           let browser = this.linkedBrowser;
           let modifiedAttrs = [];
@@ -1866,12 +1861,18 @@
             this.finishMediaBlockTimer();
           } else {
             if (browser.audioMuted) {
-              browser.unmute();
+              if (this.linkedPanel) {
++               //"Lazy Browser" should not invoke its unmute method
+                browser.unmute();
+              }
               this.removeAttribute("muted");
               BrowserUITelemetry.countTabMutingEvent("unmute", aMuteReason);
               hist.add(1 /* unmute */);
             } else {
-              browser.mute();
+              if (this.linkedPanel) {
++               //"Lazy Browser" should not invoke its unmute method
+                browser.mute();
+              }
               this.setAttribute("muted", "true");
               BrowserUITelemetry.countTabMutingEvent("mute", aMuteReason);
               hist.add(0 /* mute */);
diff --git a/browser/base/content/test/tabs/browser.ini b/browser/base/content/test/tabs/browser.ini
index e52f64d1e347..8856b7bc79f9 100644
--- a/browser/base/content/test/tabs/browser.ini
+++ b/browser/base/content/test/tabs/browser.ini
@@ -35,3 +35,4 @@ skip-if = (debug && os == 'mac') || (debug && os == 'linux' && bits == 64) #Bug
 [browser_visibleTabs_bookmarkAllTabs.js]
 [browser_visibleTabs_contextMenu.js]
 [browser_open_newtab_start_observer_notification.js]
+[browser_bug_1387976_restore_lazy_tab_browser_muted_state.js]
diff --git a/browser/base/content/test/tabs/browser_bug_1387976_restore_lazy_tab_browser_muted_state.js b/browser/base/content/test/tabs/browser_bug_1387976_restore_lazy_tab_browser_muted_state.js
new file mode 100644
index 000000000000..d13eef6899ca
--- /dev/null
+++ b/browser/base/content/test/tabs/browser_bug_1387976_restore_lazy_tab_browser_muted_state.js
@@ -0,0 +1,49 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { TabState } = ChromeUtils.import("resource:///modules/sessionstore/TabState.jsm", {});
+
+/**
+ * Simulate a restart of a tab by removing it, then add a lazy tab
+ * which is restored with the tabData of the removed tab.
+ *
+ * @param tab
+ *        The tab to restart.
+ * @return {Object} the restored lazy tab
+ */
+const restartTab = async function(tab) {
+  let tabData = TabState.clone(tab);
+  BrowserTestUtils.removeTab(tab);
+
+  let restoredLazyTab = BrowserTestUtils.addTab(gBrowser, "", {createLazyBrowser: true});
+  SessionStore.setTabState(restoredLazyTab, JSON.stringify(tabData));
+  return restoredLazyTab;
+};
+
+function get_tab_state(tab) {
+  const ss = Cc["@mozilla.org/browser/sessionstore;1"].getService(Ci.nsISessionStore);
+  return JSON.parse(ss.getTabState(tab));
+}
+
+add_task(async function() {
+  const tab = BrowserTestUtils.addTab(gBrowser, "http://mochi.test:8888/");
+  const browser = gBrowser.getBrowserForTab(tab);
+  await BrowserTestUtils.browserLoaded(browser);
+
+  // Let's make sure the tab is not in a muted state at the beginning
+  ok(!("muted" in get_tab_state(tab)), "Tab should not be in a muted state");
+
+  info("toggling Muted audio...");
+  tab.toggleMuteAudio();
+
+  ok("muted" in get_tab_state(tab), "Tab should be in a muted state");
+
+  info("Restarting tab...");
+  let restartedTab = await restartTab(tab);
+
+  ok("muted" in get_tab_state(restartedTab), "Restored tab should still be in a muted state after restart");
+
+  BrowserTestUtils.removeTab(restartedTab);
+});
