Examine source code of Quick Translate & Learn

{
  "manifest_version": 2,
  "name": "Quick Translate & Learn",
  "version": "1.0.1",
  "description": "Translates selected text using Google Translate and saves words for Quizlet.",
  "permissions": [
    "storage",
    "*://translate.googleapis.com/"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1a04c842-6ec0-434b-8f44-f88087a4b8f1}"
    }
  }
}