Examine source code of Contents Eater

{
  "manifest_version": 2,
  "name": "Contents Eater",
  "version": "1.3resigned1",
  "description": "Removes page contents automatically. The contents are specified by configuration file.",
  "applications": {
    "gecko": {
      "id": "{20ba0c1f-7874-439c-b302-97d17dd48c4a}",
      "strict_min_version": "48.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/content_scripts.js"
      ],
      "match_about_blank": true,
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "options_ui": {
    "page": "src/options.html",
    "browser_style": false,
    "open_in_tab": false
  }
}