Update manifest.json to use manifest version 2

content scripts do not start until the icon is clicked in mv3.

Author: prvashisht

manifest.json

@@ -1,5 +1,5 @@
 {
-  "manifest_version": 3,
+  "manifest_version": 2,
   "browser_specific_settings": {
     "gecko": {
       "id": "{70bd260b-d7d6-4cbb-ba2d-eb18968c33c0}",
@@ -16,7 +16,7 @@
     "48": "icons/light/icon48.png",
     "128": "icons/light/icon128.png"
   },
-  "action": {
+  "browser_action": {
     "default_icon"  : {
       "16": "icons/light/icon16.png",
       "32": "icons/light/icon32.png",
@@ -27,9 +27,7 @@
     "default_popup" : "popup/index.html"
   },
   "permissions": [
-    "storage"
-  ],
-  "host_permissions": [
+    "storage",
     "*://*.linkedin.com/"
   ],
   "content_scripts": [
@@ -41,10 +39,5 @@
   "background": {
     "scripts": ["service_worker.js"]
   },
-  "web_accessible_resources": [
-    {
-      "resources": ["icons/*/icon32.png"],
-      "matches": ["*://*.linkedin.com/*"]
-    }
-  ]
+  "web_accessible_resources": ["icons/*/icon32.png"]
 }