Examine source code of Comic Sans Everywhere

{
  "manifest_version": 2,
  "name": "Firefox Comic Sans Everywhere",
  "version": "1.4resigned1",
  "description": "Firefox addon that changes the font of every piece of text into Comic Sans MS",
  "homepage_url": "https://github.com/pieterman2000/firefox-comic-sans-everywhere",
  "icons": {
    "48": "icon_active.png"
  },
  "web_accessible_resources": [
    "sheet.css"
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": "icon_active.png",
    "default_popup": "popup_options.html",
    "default_title": "Comic Sans MS active"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "match_about_blank": true,
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "comicsansifier.js"
      ],
      "run_at": "document_start"
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3b63e020-0382-4a1e-be1e-d09f2a09f6de}"
    }
  }
}