Examine source code of Take And Edit Screenshots

{
  "manifest_version": 2,
  "name": "Easy Screenshot with edit feature",
  "version": "1.0",
  "description": "Take and edit screenshots.",
  "permissions": [
    "<all_urls>",
    "activeTab",
    "downloads",
    "storage",
    "tabs"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{26bfb07f-550c-4a58-8bb8-ea5e65573849}"
    }
  }
}