diff --git a/app/inject/_placeholder b/app/inject/_placeholder
new file mode 100644
index 0000000..e69de29
diff --git a/app/src/static/preload.js b/app/src/static/preload.js
index 91001c5..d4de189 100644
--- a/app/src/static/preload.js
+++ b/app/src/static/preload.js
@@ -2,8 +2,12 @@
  Preload file that will be executed in the renderer process
  */
 import electron from 'electron';
+import path from 'path';
+import fs from 'fs';
 const {ipcRenderer, webFrame} = electron;
 
+const INJECT_JS_PATH = path.join(__dirname, '../../', 'inject/inject.js');
+
 setNotificationCallback((title, opt) => {
     ipcRenderer.send('notification', title, opt);
 });
@@ -26,6 +30,7 @@ document.addEventListener('DOMContentLoaded', event => {
         ipcRenderer.send('contextMenuOpened', targetHref);
     }, false);
 
+    injectScripts();
 });
 
 ipcRenderer.on('params', (event, message) => {
@@ -62,3 +67,11 @@ function clickSelector(element) {
     const mouseEvent = new MouseEvent('click');
     element.dispatchEvent(mouseEvent);
 }
+
+function injectScripts() {
+    const needToInject = fs.existsSync(INJECT_JS_PATH);
+    if (!needToInject) {
+        return;
+    }
+    require(INJECT_JS_PATH);
+}
diff --git a/package.json b/package.json
index c5340dd..e5ca7e8 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "clean": "gulp clean",
     "build": "gulp build",
     "watch": "while true ; do gulp watch ; done",
-    "package-placeholder": "npm run build && node lib/cli.js http://www.bennish.net/web-notifications.html ~/Desktop --overwrite --name notification-test --icon ./test-resources/iconSampleGrey.png && open ~/Desktop/notification-test-darwin-x64/notification-test.app",
+    "package-placeholder": "npm run build && node lib/cli.js http://www.bennish.net/web-notifications.html ~/Desktop --overwrite --name notification-test --icon ./test-resources/iconSampleGrey.png --inject ./test-resources/test-injection.js && open ~/Desktop/notification-test-darwin-x64/notification-test.app",
     "start-placeholder": "npm run build && electron app",
     "release": "gulp release"
   },
diff --git a/src/build/buildApp.js b/src/build/buildApp.js
index 79ec1d0..7c50271 100644
--- a/src/build/buildApp.js
+++ b/src/build/buildApp.js
@@ -24,7 +24,30 @@ function buildApp(src, dest, options, callback) {
         }
 
         fs.writeFileSync(path.join(dest, '/nativefier.json'), JSON.stringify(appArgs));
-        changeAppPackageJsonName(dest, appArgs.name, appArgs.targetUrl);
+
+        maybeCopyScripts(options.inject, dest, error => {
+            if (error) {
+                callback(error);
+                return;
+            }
+
+            changeAppPackageJsonName(dest, appArgs.name, appArgs.targetUrl);
+            callback();
+        });
+    });
+}
+
+function maybeCopyScripts(src, dest, callback) {
+    if (!fs.existsSync(src)) {
+        callback();
+        return;
+    }
+
+    copy(src, path.join(dest, 'inject', 'inject.js'), error => {
+        if (error) {
+            callback(`Error Copying injection files: ${error}`);
+            return;
+        }
         callback();
     });
 }
diff --git a/src/cli.js b/src/cli.js
index ca82e5a..60d0c4c 100755
--- a/src/cli.js
+++ b/src/cli.js
@@ -31,6 +31,7 @@ if (require.main === module) {
         .option('--ignore-certificate', 'ignore certificate related errors')
         .option('--insecure', 'enable loading of insecure content, defaults to false')
         .option('--flash <value>', 'path to Chrome flash plugin, find it in `Chrome://plugins`')
+        .option('--inject <value>', 'path to a javascript file to be injected')
         .parse(process.argv);
 
     if (!process.argv.slice(2).length) {
diff --git a/src/options/optionsMain.js b/src/options/optionsMain.js
index 91d0d70..43d7068 100644
--- a/src/options/optionsMain.js
+++ b/src/options/optionsMain.js
@@ -48,7 +48,8 @@ function optionsFactory(inpOptions, callback) {
         userAgent: inpOptions.userAgent || getFakeUserAgent(),
         ignoreCertificate: inpOptions.ignoreCertificate || false,
         insecure: inpOptions.insecure || false,
-        flashPluginDir: inpOptions.flash || null
+        flashPluginDir: inpOptions.flash || null,
+        inject: inpOptions.inject || null
     };
 
     if (inpOptions.honest) {
diff --git a/test-resources/test-injection.js b/test-resources/test-injection.js
new file mode 100644
index 0000000..ec33ddf
--- /dev/null
+++ b/test-resources/test-injection.js
@@ -0,0 +1 @@
+console.log('This is a test injecton script');