Examine source code of No VK Feed

{
  "manifest_version": 2,
  "name": "No VK Feed",
  "version": "1.1",
  "description": "No more vk feed",
  "icons": {
    "48": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.vk.com/*"
      ],
      "js": [
        "clearNews.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7cb0d1bc-7c1b-443c-90f5-919f65274f8b}"
    }
  }
}