Examine source code of Twitterぼかし＋

{
  "name": "Twitterぼかし＋",
  "version": "1.0.1resigned1",
  "manifest_version": 2,
  "description": "DMで投稿された画像/動画＆ツイートされた画像/動画をぼかします",
  "web_accessible_resources": [
    "twitter_mosaic.css"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://twitter.com/*"
      ],
      "css": [
        "twitter_mosaic.css"
      ],
      "js": [
        "borderify.js"
      ]
    }
  ],
  "icons": {
    "128": "128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6f020a1e-bd7d-4301-babd-69a160c13f5c}"
    }
  }
}