diff --git a/caps/nsIAddonPolicyService.idl b/caps/nsIAddonPolicyService.idl
index d89de56aff95..0932be05cb35 100644
--- a/caps/nsIAddonPolicyService.idl
+++ b/caps/nsIAddonPolicyService.idl
@@ -52,6 +52,12 @@ interface nsIAddonPolicyService : nsISupports
    */
   boolean addonMayLoadURI(in AString aAddonId, in nsIURI aURI, [optional] in boolean aExplicit);
 
+  /**
+   * Returns the name of the WebExtension with the given ID, or the ID string
+   * if no matching add-on can be found.
+   */
+  AString getExtensionName(in AString aAddonId);
+
   /**
    * Returns true if a given extension:// URI is web-accessible.
    */
diff --git a/dom/webidl/WebExtensionPolicy.webidl b/dom/webidl/WebExtensionPolicy.webidl
index f1cedbb33c07..6a7742d48397 100644
--- a/dom/webidl/WebExtensionPolicy.webidl
+++ b/dom/webidl/WebExtensionPolicy.webidl
@@ -34,6 +34,12 @@ interface WebExtensionPolicy {
   [Constant]
   readonly attribute ByteString baseURL;
 
+  /**
+   * The extension's user-visible name.
+   */
+  [Constant]
+  readonly attribute DOMString name;
+
   /**
    * The content security policy string to apply to all pages loaded from the
    * extension's moz-extension: protocol.
@@ -142,6 +148,8 @@ dictionary WebExtensionInit {
 
   required DOMString baseURL;
 
+  DOMString name = "";
+
   required WebExtensionLocalizeCallback localizeCallback;
 
   required MatchPatternSet allowedOrigins;
diff --git a/toolkit/components/extensions/Extension.jsm b/toolkit/components/extensions/Extension.jsm
index 1c91019d2dca..02920eca5a33 100644
--- a/toolkit/components/extensions/Extension.jsm
+++ b/toolkit/components/extensions/Extension.jsm
@@ -993,6 +993,7 @@ this.Extension = class extends ExtensionData {
     return {
       id: this.id,
       uuid: this.uuid,
+      name: this.name,
       instanceId: this.instanceId,
       manifest: this.manifest,
       resourceURL: this.resourceURL,
diff --git a/toolkit/components/extensions/ExtensionPolicyService.cpp b/toolkit/components/extensions/ExtensionPolicyService.cpp
index 449e81a47a80..30899a8cef65 100644
--- a/toolkit/components/extensions/ExtensionPolicyService.cpp
+++ b/toolkit/components/extensions/ExtensionPolicyService.cpp
@@ -377,6 +377,17 @@ ExtensionPolicyService::AddonMayLoadURI(const nsAString& aAddonId,
   return NS_ERROR_INVALID_ARG;
 }
 
+nsresult
+ExtensionPolicyService::GetExtensionName(const nsAString& aAddonId,
+                                         nsAString& aName)
+{
+  if (WebExtensionPolicy* policy = GetByID(aAddonId)) {
+    aName.Assign(policy->Name());
+    return NS_OK;
+  }
+  return NS_ERROR_INVALID_ARG;
+}
+
 nsresult
 ExtensionPolicyService::ExtensionURILoadableByAnyone(nsIURI* aURI, bool* aResult)
 {
diff --git a/toolkit/components/extensions/WebExtensionPolicy.cpp b/toolkit/components/extensions/WebExtensionPolicy.cpp
index 498f545a3a04..86249b9e7b2e 100644
--- a/toolkit/components/extensions/WebExtensionPolicy.cpp
+++ b/toolkit/components/extensions/WebExtensionPolicy.cpp
@@ -89,6 +89,7 @@ WebExtensionPolicy::WebExtensionPolicy(GlobalObject& aGlobal,
                                        ErrorResult& aRv)
   : mId(NS_AtomizeMainThread(aInit.mId))
   , mHostname(aInit.mMozExtensionHostname)
+  , mName(aInit.mName)
   , mContentSecurityPolicy(aInit.mContentSecurityPolicy)
   , mLocalizeCallback(aInit.mLocalizeCallback)
   , mPermissions(new AtomSet(aInit.mPermissions))
diff --git a/toolkit/components/extensions/WebExtensionPolicy.h b/toolkit/components/extensions/WebExtensionPolicy.h
index 167cab8f593b..30f4612a28c9 100644
--- a/toolkit/components/extensions/WebExtensionPolicy.h
+++ b/toolkit/components/extensions/WebExtensionPolicy.h
@@ -82,6 +82,15 @@ public:
 
   void Localize(const nsAString& aInput, nsString& aResult) const;
 
+  const nsString& Name() const
+  {
+    return mName;
+  }
+  void GetName(nsAString& aName) const
+  {
+    aName = mName;
+  }
+
   const nsString& ContentSecurityPolicy() const
   {
     return mContentSecurityPolicy;
@@ -153,6 +162,7 @@ private:
   nsCString mHostname;
   nsCOMPtr<nsIURI> mBaseURI;
 
+  nsString mName;
   nsString mContentSecurityPolicy;
 
   bool mActive = false;
diff --git a/toolkit/components/extensions/extension-process-script.js b/toolkit/components/extensions/extension-process-script.js
index 51ce682813ae..523d432766ba 100644
--- a/toolkit/components/extensions/extension-process-script.js
+++ b/toolkit/components/extensions/extension-process-script.js
@@ -317,6 +317,7 @@ ExtensionManager = {
       policy = new WebExtensionPolicy({
         id: extension.id,
         mozExtensionHostname: extension.uuid,
+        name: extension.name,
         baseURL: extension.resourceURL,
 
         permissions: Array.from(extension.permissions),