Examine source code of CASE_N

{
  "manifest_version": 2,
  "name": "CASE_N",
  "description": "FIND_CASE_Number",
  "version": "1005",
  "icons": {
    "128": "icon.png"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "content_script.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "<all_urls>",
    "contextMenus",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "suness@gmail.com"
    }
  }
}