Examine source code of Medium Bookmarklets

{
  "manifest_version": 2,
  "name": "medium-bookmarklets",
  "version": "1.1.2resigned1",
  "description": "Easy way to save your place in Medium articles and return to them later.",
  "icons": {
    "64": "resources/icons/sidebar_icon_64.png",
    "128": "resources/icons/sidebar_icon_128.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/bookmarklets.js"
      ],
      "css": [
        "content/styles.css"
      ]
    }
  ],
  "sidebar_action": {
    "default_title": "Medium Bookmarklets",
    "default_panel": "sidebar/sidebar.html",
    "default_icon": "resources/sidebar_icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{24fcbcc8-52e8-49fe-95d6-194e7511401b}"
    }
  }
}