Function to block browser extensions

Author: ocdtrekkie

Properties/AssemblyInfo.cs

@@ -32,5 +32,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.0.12")]
-[assembly: AssemblyFileVersion("1.0.0.12")]
+[assembly: AssemblyVersion("1.0.0.13")]
+[assembly: AssemblyFileVersion("1.0.0.13")]

XRFAgent.csproj

@@ -25,7 +25,7 @@
     <UpdatePeriodically>false</UpdatePeriodically>
     <UpdateRequired>false</UpdateRequired>
     <MapFileExtensions>true</MapFileExtensions>
-    <ApplicationRevision>12</ApplicationRevision>
+    <ApplicationRevision>13</ApplicationRevision>
     <ApplicationVersion>1.0.0.%2a</ApplicationVersion>
     <UseApplicationTrust>false</UseApplicationTrust>
     <BootstrapperEnabled>true</BootstrapperEnabled>
@@ -119,7 +119,7 @@
       <Version>6.1.0</Version>
     </PackageReference>
     <PackageReference Include="System.Text.Json">
-      <Version>9.0.0</Version>
+      <Version>9.0.2</Version>
     </PackageReference>
   </ItemGroup>
   <ItemGroup>

modCommand.cs

@@ -32,6 +32,7 @@ public static void Handle(string inputCommand, string inputSource, string reques
                 case "disable" when inputData.Length == 2:
                     if (inputData[1] == "autoupdate") { outputResponse = modUpdate.DisableAutoupdate(); }
                     if (inputData[1] == "rundialog") { outputResponse = modSystem.ConfigureRunDialog(inputData[0]); }
+                    if (inputData[1] == "webextensions") { outputResponse = modSystem.DisableWebExtensions(); }
                     if (inputData[1] == "webnotifications") { outputResponse = modSystem.DisableWebNotifications(); } break;
                 case "enable" when inputData.Length == 2:
                     if (inputData[1] == "autoupdate") { outputResponse = modUpdate.EnableAutoupdate(); }

modSystem.cs

@@ -278,6 +278,26 @@ public static string ConfigureRunDialog(string action)
             return "Run dialog " + action + "d";
         }
 
+        /// <summary>
+        /// Disables installing or using any browser extensions on Chrome, Edge, and Firefox
+        /// but permits uBlock Origin, Privacy Badger, and Facebook Container on Firefox
+        /// </summary>
+        /// <returns></returns>
+
+        public static string DisableWebExtensions()
+        {
+            RegistryKey chromeExtensions = Registry.LocalMachine.CreateSubKey(@"SOFTWARE\Policies\Google\Chrome\ExtensionInstallBlocklist", true);
+            chromeExtensions.SetValue("1", "*", RegistryValueKind.String);
+            RegistryKey edgeExtensions = Registry.LocalMachine.CreateSubKey(@"SOFTWARE\Policies\Microsoft\Edge\ExtensionInstallBlocklist", true);
+            edgeExtensions.SetValue("1", "*", RegistryValueKind.String);
+            RegistryKey firefoxExtensions = Registry.LocalMachine.CreateSubKey(@"SOFTWARE\Policies\Mozilla\Firefox", true);
+            string[] firefoxExtensionPolicy = {"{", "  \"*\":{", "    \"blocked_install_message\": \"Unapproved extensions are not permitted.\",", "    \"install_sources\": [\"about:addons\",\"https://addons.mozilla.org/\"],", "    \"installation_mode\": \"blocked\",", "    \"allowed_types\": [\"extension\"]", "  },", "  \"[email protected]\":{", "    \"installation_mode\": \"allowed\"", "  },", "  \"jid1-MnnxcxisBPnSXQ@jetpack\":{", "    \"installation_mode\": \"allowed\"", "  },", "  \"@contain-facebook\":{", "    \"installation_mode\": \"allowed\"", "  }", "}" };
+            firefoxExtensions.SetValue("ExtensionSettings2", firefoxExtensionPolicy, RegistryValueKind.MultiString);
+
+            modSync.SendSingleConfig("Security_WebExtensions", "disabled");
+            return "Browser extensions disabled";
+        }
+
         /// <summary>
         /// Disables the browser Notifications API on Chrome, Edge, and Firefox
         /// </summary>