diff --git a/mobile/android/components/extensions/ext-pageAction.js b/mobile/android/components/extensions/ext-pageAction.js
index 88d5bb9b439b..4e134ebbaf87 100644
--- a/mobile/android/components/extensions/ext-pageAction.js
+++ b/mobile/android/components/extensions/ext-pageAction.js
@@ -32,7 +32,7 @@ function PageAction(options, extension) {
 
   this.options = {
     title: options.default_title || extension.name,
-    id: extension.id,
+    id: `{${extension.uuid}}`,
     clickCallback: () => {
       if (this.popupUrl) {
         let win = Services.wm.getMostRecentWindow("navigator:browser");
diff --git a/mobile/android/components/extensions/test/mochitest/head.js b/mobile/android/components/extensions/test/mochitest/head.js
index 3d618d3ed148..be9683682f1c 100644
--- a/mobile/android/components/extensions/test/mochitest/head.js
+++ b/mobile/android/components/extensions/test/mochitest/head.js
@@ -6,10 +6,10 @@ const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
 
 Cu.import("resource://gre/modules/PageActions.jsm");
 
-function isPageActionShown(extensionId) {
-  return PageActions.isShown(extensionId);
+function isPageActionShown(uuid) {
+  return PageActions.isShown(uuid);
 }
 
-function clickPageAction(extensionId) {
-  PageActions.synthesizeClick(extensionId);
+function clickPageAction(uuid) {
+  PageActions.synthesizeClick(uuid);
 }
diff --git a/mobile/android/components/extensions/test/mochitest/test_ext_pageAction.html b/mobile/android/components/extensions/test/mochitest/test_ext_pageAction.html
index 4acb041ceeb6..b13c551bdc56 100644
--- a/mobile/android/components/extensions/test/mochitest/test_ext_pageAction.html
+++ b/mobile/android/components/extensions/test/mochitest/test_ext_pageAction.html
@@ -41,10 +41,15 @@ function background() {
     browser.test.sendMessage("page-action-clicked");
   });
 
-  browser.test.sendMessage("ready");
+  let extensionInfo = {
+    // Extract the assigned uuid from the background page url.
+    uuid: `{${window.location.hostname}}`,
+  };
+
+  browser.test.sendMessage("ready", extensionInfo);
 }
 
-add_task(function* test_contentscript() {
+add_task(function* test_pageAction() {
   let extension = ExtensionTestUtils.loadExtension({
     background,
     manifest: {
@@ -55,6 +60,11 @@ add_task(function* test_contentscript() {
           "18": "extension.png",
         },
       },
+      "applications": {
+        "gecko": {
+          "id": "foo@bar.com",
+        },
+      },
     },
     files: {
       "extension.png": IMAGE_ARRAYBUFFER,
@@ -62,26 +72,26 @@ add_task(function* test_contentscript() {
   });
 
   yield extension.startup();
-  yield extension.awaitMessage("ready");
+  let {uuid} = yield extension.awaitMessage("ready");
 
   extension.sendMessage("pageAction-show");
   yield extension.awaitMessage("page-action-shown");
-  ok(isPageActionShown(extension.id), "The PageAction should be shown");
+  ok(isPageActionShown(uuid), "The PageAction should be shown");
 
   extension.sendMessage("pageAction-hide");
   yield extension.awaitMessage("page-action-hidden");
-  ok(!isPageActionShown(extension.id), "The PageAction should be hidden");
+  ok(!isPageActionShown(uuid), "The PageAction should be hidden");
 
   extension.sendMessage("pageAction-show");
   yield extension.awaitMessage("page-action-shown");
-  ok(isPageActionShown(extension.id), "The PageAction should be shown");
+  ok(isPageActionShown(uuid), "The PageAction should be shown");
 
-  clickPageAction(extension.id);
+  clickPageAction(uuid);
   yield extension.awaitMessage("page-action-clicked");
-  ok(isPageActionShown(extension.id), "The PageAction should still be shown after being clicked");
+  ok(isPageActionShown(uuid), "The PageAction should still be shown after being clicked");
 
   yield extension.unload();
-  ok(!isPageActionShown(extension.id), "The PageAction should be removed after unload");
+  ok(!isPageActionShown(uuid), "The PageAction should be removed after unload");
 });
 </script>
 
diff --git a/mobile/android/components/extensions/test/mochitest/test_ext_pageAction_popup.html b/mobile/android/components/extensions/test/mochitest/test_ext_pageAction_popup.html
index e0b6036bc9fb..89edc7c298e8 100644
--- a/mobile/android/components/extensions/test/mochitest/test_ext_pageAction_popup.html
+++ b/mobile/android/components/extensions/test/mochitest/test_ext_pageAction_popup.html
@@ -54,7 +54,12 @@ add_task(function* test_contentscript() {
       browser.test.sendMessage("page-action-onClicked-fired");
     });
 
-    browser.test.sendMessage("ready");
+    let extensionInfo = {
+      // Extract the assigned uuid from the background page url.
+      uuid: `{${window.location.hostname}}`,
+    };
+
+    browser.test.sendMessage("ready", extensionInfo);
   }
 
   function popupScript() {
@@ -107,7 +112,7 @@ add_task(function* test_contentscript() {
     });
   };
 
-  function* testPopup(name) {
+  function* testPopup(name, uuid) {
     // We don't need to set the popup when testing default_popup.
     if (name != "default.html") {
       extension.sendMessage("page-action-set-popup", {name});
@@ -124,7 +129,7 @@ add_task(function* test_contentscript() {
       extension.sendMessage("page-action-enable-onClicked-listener");
       yield extension.awaitMessage("page-action-onClicked-listener-enabled");
 
-      clickPageAction(extension.id);
+      clickPageAction(uuid);
       yield extension.awaitMessage("page-action-onClicked-fired");
 
       extension.sendMessage("page-action-disable-onClicked-listener");
@@ -132,7 +137,7 @@ add_task(function* test_contentscript() {
     } else {
       ok(url.includes(name), "Calling pageAction.getPopup should return the correct popup URL when the popup is set.");
 
-      clickPageAction(extension.id);
+      clickPageAction(uuid);
       let location = yield extension.awaitMessage("page-action-from-popup");
       ok(location.includes(name), "The popup with the correct URL should be shown.");
 
@@ -144,19 +149,19 @@ add_task(function* test_contentscript() {
   }
 
   yield extension.startup();
-  yield extension.awaitMessage("ready");
+  let {uuid} = yield extension.awaitMessage("ready");
 
   extension.sendMessage("page-action-show");
   yield extension.awaitMessage("page-action-shown");
-  ok(isPageActionShown(extension.id), "The PageAction should be shown.");
+  ok(isPageActionShown(uuid), "The PageAction should be shown.");
 
-  yield testPopup("default.html");
-  yield testPopup("a.html");
-  yield testPopup("");
-  yield testPopup("b.html");
+  yield testPopup("default.html", uuid);
+  yield testPopup("a.html", uuid);
+  yield testPopup("", uuid);
+  yield testPopup("b.html", uuid);
 
   yield extension.unload();
-  ok(!isPageActionShown(extension.id), "The PageAction should be removed after unload.");
+  ok(!isPageActionShown(uuid), "The PageAction should be removed after unload.");
 });
 </script>