Examine source code of archiveorg-addons

{
  "manifest_version": 2,
  "name": "archiveorg-addons",
  "description": "save files link to file, only works on https://archive.org/download/*",
  "version": "0.0.1.3",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "archiveorg-addons@example.com"
    }
  },
  "icons": {
    "48": "icons/48.png"
  },
  "page_action": {
    "default_icon": "icons/48.png",
    "default_title": "archiveorg-addons",
    "show_matches": [
      "https://archive.org/download/*"
    ]
  },
  "background": {
    "page": "background.html"
  },
  "permissions": [
    "https://archive.org/download/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://archive.org/download/*"
      ],
      "js": [
        "js/archiveorg.js"
      ]
    }
  ]
}