Examine source code of slim Bookmarks

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.4.1",
  "homepage_url": "http://crossblade.her.jp",
  "icons": {
    "32": "icons/icon_32.png",
    "48": "icons/icon_48.png",
    "64": "icons/icon_64.png",
    "128": "icons/icon_128.png"
  },
  "applications": {
    "gecko": {
      "id": "slim_bookmarks@crossblade.her.jp",
      "strict_min_version": "52.0"
    }
  },
  "permissions": [
    "http://*/*",
    "https://*/*",
    "activeTab",
    "bookmarks",
    "storage"
  ],
  "background": {
    "scripts": [
      "background-script.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon_32.png",
    "default_title": "Popup bookmark folder",
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "settings/options.html"
  },
  "default_locale": "en"
}