Examine source code of ThemeChoosy

{
  "manifest_version": 2,
  "name": "ThemeChoosy",
  "version": "1.0",
  "description": "Converts dark themes in video code tutorials to Solarized Light",
  "icons": {
    "48": "icon/active.svg",
    "96": "icon/active.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "/content_scripts/themeInjector.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "page_action": {
    "show_matches": [
      "<all_urls>"
    ],
    "default_icon": "icon/active.svg",
    "default_title": "Themechoosy"
  },
  "browser_action": {
    "default_icon": "icon/active.svg",
    "default_title": "ThemeChoosy",
    "default_popup": "popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cc1cd1f1-05c1-4569-a4d9-e81eecd4651a}"
    }
  }
}