Examine source code of Save URL to Wayback Machine

{
  "manifest_version": 2,
  "name": "Archive URL",
  "version": "1.9",
  "author": "Jonathan McCann",
  "homepage_url": "https://github.com/jonathanmccann/archive-url-firefox-addon",
  "description": "This Firefox addon will add a new item to the context menu and a button the toolbar menu, allowing you to archive the current webpage to the Wayback Machine, archive.today, and Ghost Archive. When right clicking on a link or an image, you can choose to archive that URL instead of the current URL.",
  "icons": {
    "16": "icons/archive-icon-dark-16.png",
    "32": "icons/archive-icon-dark-32.png",
    "64": "icons/archive-icon-dark-64.png",
    "128": "icons/archive-icon-dark-128.png"
  },
  "options_ui": {
    "page": "options/options.html"
  },
  "permissions": [
    "contextMenus",
    "storage",
    "tabs"
  ],
  "browser_action": {
    "browser_style": false,
    "default_icon": {
      "16": "icons/archive-icon-dark-16.png",
      "32": "icons/archive-icon-dark-32.png"
    },
    "default_title": "Archive to Wayback Machine",
    "theme_icons": [
      {
        "light": "icons/archive-icon-light-16.png",
        "dark": "icons/archive-icon-dark-16.png",
        "size": 16
      },
      {
        "light": "icons/archive-icon-light-32.png",
        "dark": "icons/archive-icon-dark-32.png",
        "size": 32
      }
    ]
  },
  "background": {
    "scripts": [
      "archive.js"
    ]
  }
}