Examine source code of Blog Killfile

{
  "applications": {
    "gecko": {
      "id": "dtm-killlfile@martin.snowplow.org",
      "strict_min_version": "42.0"
    }
  },
  "background": {
    "persistent": true,
    "scripts": [
      "serverload.js",
      "define.js",
      "scenarios.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "all_frames": false,
      "css": [
        "scenario.css"
      ],
      "js": [
        "clientload.js",
        "define.js",
        "startthunk.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_start"
    },
    {
      "all_frames": true,
      "css": [
        "scenario.css"
      ],
      "js": [
        "clientload.js",
        "define.js",
        "startthunk.js"
      ],
      "matches": [
        "*://disqus.com/embed*",
        "*://*.disqus.com/embed*"
      ],
      "run_at": "document_idle"
    }
  ],
  "description": "Provides a killfile for certain blogs.",
  "icons": {
    "48": "kficon48.png",
    "64": "kficon64.png",
    "128": "kficon128.png"
  },
  "manifest_version": 2,
  "name": "Blog Comment Killfile",
  "page_action": {
    "default_icon": {
      "19": "kficon19.png",
      "38": "kficon38.png",
      "48": "kficon48.png",
      "64": "kficon64.png",
      "128": "kficon128.png"
    },
    "default_title": "Killfile inactive"
  },
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*",
    "storage",
    "alarms"
  ],
  "short_name": "killfile",
  "version": "0.2.12resigned1"
}