Examine source code of Password Defense

{
  "manifest_version": 2,
  "name": "Password Defense",
  "author": "Pango Group",
  "version": "1.0.8",
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "80.0",
      "id": "{391b3b31-5ade-4b13-9911-ff6163ba3ffe}"
    }
  },
  "description": "Password Defense secures your passwords and helps you browse online more securely and privately.",
  "icons": {
    "16": "images/store-icon-16.png",
    "48": "images/store-icon-48.png",
    "96": "images/store-icon-96.png",
    "128": "images/store-icon-128.png"
  },
  "background": {
    "scripts": [
      "js/background-firefox.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "images/action-icon/active_16.png",
      "32": "images/action-icon/active_32.png",
      "64": "images/action-icon/active_64.png"
    },
    "default_title": "Password Defense – Password Manager"
  },
  "permissions": [
    "tabs",
    "alarms",
    "privacy",
    "webNavigation",
    "storage",
    "scripting",
    "<all_urls>"
  ],
  "incognito": "spanning",
  "web_accessible_resources": [
    "images/*.png",
    "images/*.jpg",
    "images/*.svg",
    "fonts/*.woff",
    "fonts/*.woff2",
    "videos/*.mp4",
    "_locales/**/*.json",
    "css/**/*.css",
    "js/*.js",
    "js/*.js.map",
    "html/*.html"
  ],
  "content_scripts": [
    {
      "run_at": "document_start",
      "all_frames": false,
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/main-app-content-firefox.js"
      ],
      "css": [
        "css/fonts/style.css"
      ]
    },
    {
      "run_at": "document_start",
      "all_frames": true,
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/other-content-firefox.js"
      ]
    }
  ],
  "content_security_policy": "script-src 'self' 'sha256-v8v3RKRPmN4odZ1CWM5gw80QKPCCWMcpNeOmimNL2AA=' 'unsafe-eval'; object-src 'self'; font-src * "
}