Examine source code of GrizBlock

{
  "name": "GrizBlock",
  "description": "Ultimate nepali news portal ad blocker",
  "version": "1.1",
  "manifest_version": 2,
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "/images/icon16.png",
    "32": "/images/icon32.png",
    "48": "/images/icon48.png",
    "128": "/images/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.onlinekhabar.com/*",
        "*://*.ekantipur.com/*",
        "*://*.setopati.com/*",
        "*://*.ratopati.com/*",
        "*://*.annapurnapost.com/*",
        "*://*.techpana.com/*",
        "*://*.nepalpress.com/*",
        "*://*.baahrakhari.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5251459b-29e4-4212-a808-7e5e9fb41ee9}"
    }
  }
}