Examine source code of Speed Translate

{
  "name": "Speed Translate",
  "description": "This addon provides quick translation of selected texts",
  "version": "2.5",
  "manifest_version": 2,
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "http://*/*",
        "https://*/*",
        "*://*/*"
      ],
      "css": [
        "css/translate_popup.css"
      ],
      "js": [
        "js/common/saferInnerHTML.js",
        "js/common/common.js",
        "js/common/jquery-3.4.1.js",
        "js/common/jquery.draggable.js",
        "js/common/languages.js",
        "js/contentscript/reminderhelper.js",
        "js/contentscript/translate.js",
        "js/contentscript/main.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "js/common/common.js",
      "js/background/reminder.js",
      "js/background/googlespeak.js",
      "js/background/background.js"
    ]
  },
  "web_accessible_resources": [
    "icons/*",
    "css/*"
  ],
  "browser_action": {
    "default_icon": {
      "19": "icons/icon19.png",
      "38": "icons/icon38.png"
    },
    "default_title": "Speed Translate",
    "default_popup": "popup.html"
  },
  "permissions": [
    "http://*/*",
    "https://*/*",
    "*://*/*",
    "storage"
  ],
  "applications": {
    "gecko": {
      "id": "@speedtranslate",
      "strict_min_version": "57.0"
    }
  },
  "content_security_policy": "script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self'; object-src 'self'; frame-src 'self'",
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Q"
      }
    }
  }
}