Examine source code of Slack View Optimizer

{
  "name": "__MSG_appName__",
  "version": "1.1.2resigned1",
  "manifest_version": 2,
  "description": "__MSG_appDesc__",
  "default_locale": "ja",
  "icons": {
    "128": "icon/128.png"
  },
  "applications": {
    "gecko": {
      "id": "wkm.apps@gmail.com",
      "strict_min_version": "42.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.slack.com/*"
      ],
      "js": [
        "script/highlight.js",
        "script/starred_items.js",
        "script/display_unread_room_num.js"
      ],
      "css": [
        "style/style.css"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  }
}