button added

content.js

@@ -0,0 +1,17 @@
+function addButton() {
+  const toolbarDiv = document.querySelector('div[data-testid="toolBar"]');
+  if (toolbarDiv && !toolbarDiv.hasAttribute('data-button-added')) {
+
+    const button = document.createElement('button');
+    button.textContent = 'Mahesh Tweets';
+
+    if (toolbarDiv.parentNode) {
+      toolbarDiv.parentNode.insertBefore(button, toolbarDiv);
+      console.log('Selected toolbar div:', toolbarDiv);
+      console.log("Button Added",button);
+    }
+    toolbarDiv.setAttribute('data-button-added', 'true');
+  }
+  setTimeout(addButton, 200); //delay added
+}
+addButton();

manifest.json

@@ -3,20 +3,21 @@
     "name": "Mahesh Tweets",
     "version": "1.0",
     "permissions": [
-      "activeTab"
+    "activeTab"
     ],
     "content_scripts": [
-      {
+    {
+        "matches": ["https://twitter.com/*"],
         "js": ["content.js"]
-      }
+    }
     ],
     "action": {
-      "default_popup": "popup.html",
-      "default_icon": {
+    "default_popup": "popup.html",
+    "default_icon": {
         "128": "/images/icon.png"
-      }
+    }
     },
     "icons": {
-      "128": "/images/icon.png"
+    "128": "/images/icon.png"
     }
 }