Examine source code of True Captcha

{
  "name": "True Captcha",
  "description": "Solve image captchas automatically in the browser.",
  "version": "0.1",
  "permissions": [
    "storage",
    "https://api.apitruecaptcha.org/*",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@apitruecaptcha.org",
      "strict_min_version": "80.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    "data/hosts.json",
    "popup.css"
  ],
  "page_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "/images/TrueCaptchaLogo16.png",
      "32": "/images/TrueCaptchaLogo32.png",
      "48": "/images/TrueCaptchaLogo48.png",
      "128": "/images/TrueCaptchaLogo128.png"
    }
  },
  "browser_action": {
    "default_icon": "/images/TrueCaptchaLogo32.png",
    "default_title": "TrueCaptcha",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "/images/TrueCaptchaLogo16.png",
    "32": "/images/TrueCaptchaLogo32.png",
    "48": "/images/TrueCaptchaLogo48.png",
    "128": "/images/TrueCaptchaLogo128.png"
  },
  "manifest_version": 2
}