Examine source code of Leo Translate

{
  "manifest_version": 2,
  "name": "Leo Translate",
  "version": "1.18.0",
  "description": "Translate words on the internet pages using LinguaLeo API and add words to the LinguaLeo Dictionary.",
  "applications": {
    "gecko": {
      "id": "leotranslate@mdnsk",
      "strict_min_version": "57.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "dist/vendor.js",
        "dist/content-render.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "dist/vendor.js",
        "dist/content-capture.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "dist/vendor.js",
      "dist/background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/icon128.png",
    "theme_icons": [
      {
        "light": "icons/light-icon.svg",
        "dark": "icons/icon.svg",
        "size": 16
      },
      {
        "light": "icons/light-icon.svg",
        "dark": "icons/icon.svg",
        "size": 32
      }
    ],
    "default_title": "LeoTranslate",
    "default_popup": "templates/browser-action.html"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "options_ui": {
    "page": "templates/options-page.html",
    "browser_style": true
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+L"
      }
    }
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "notifications",
    "storage",
    "cookies",
    "*://api.lingualeo.com/*"
  ],
  "web_accessible_resources": [
    "templates/popup-iframe.html"
  ]
}