Examine source code of archiveph

{
  "name": "archiveph",
  "version": "1.6.0",
  "manifest_version": 2,
  "description": "Show archive page",
  "permissions": [
    "tabs",
    "https://archive.is/*",
    "https://web.archive.org/*"
  ],
  "icons": {
    "48": "icons/48.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://archive.is/*"
      ],
      "js": [
        "page.js"
      ]
    }
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/32.png",
    "default_title": "Show archive page"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a707cbd6-3d32-4c20-952c-91e1662c532e}"
    }
  }
}