Examine source code of Content Edit & Blur

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Content Edit & Blur",
  "author": "Hasan Abo-Shally",
  "version": "1.3.0",
  "description": "Easily edit, replace or blur elements on any webpage",
  "homepage_url": "https://github.com/HasanAboShally/web-content-edit-and-blur--browser-extension",
  "icons": {
    "128": "images/app-icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": {
      "19": "images/icons/19x19/icon-idle.png",
      "38": "images/icons/38x38/icon-idle.png"
    },
    "default_title": "Content Edit & Blur"
  }
}