Examine source code of Adex

{
  "manifest_version": 2,
  "name": "Adex",
  "version": "1resigned1",
  "description": "Removes all ads form search results (google, bing)",
  "icons": {
    "48": "icons/adex-48.png",
    "96": "icons/adex-96.png"
  },
  "applications": {
    "gecko": {
      "id": "adex@meiller-medien.de",
      "strict_min_version": "45.0"
    }
  },
  "permissions": [
    "*://developer.mozilla.org/*",
    "webRequest",
    "webRequestBlocking",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "adex.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "bgr_adex.js"
    ]
  }
}