Examine source code of Open Links in Tabs

{
  "manifest_version": 2,
  "name": "Open Links in Tabs",
  "version": "1.1.3",
  "author": "André Veríssimo",
  "default_locale": "en",
  "applications": {
    "gecko": {
      "id": "open.links.in.tabs@gmail.com",
      "strict_min_version": "57.0"
    }
  },
  "description": "Open Links in Tabs",
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "contextMenus",
    "storage"
  ],
  "background": {
    "scripts": [
      "src/defaults.js",
      "src/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "js": [
        "src/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  }
}