Examine source code of DevCache

{
  "manifest_version": 3,
  "name": "DevCache",
  "version": "0.1.6",
  "description": "Save accepted LeetCode solutions, technical summaries, notes, and interview questions.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "DevCache",
    "default_popup": "index.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "devcache@ranjeet.dev",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteContent",
          "authenticationInfo"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "scripting",
    "notifications"
  ],
  "host_permissions": [
    "http://localhost:8080/*",
    "https://devcache.onrender.com/*",
    "https://*.onrender.com/*",
    "https://leetcode.com/*",
    "https://*/*",
    "http://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://leetcode.com/*",
        "https://*.leetcode.com/*"
      ],
      "js": [
        "content/leetcode-hook.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    },
    {
      "matches": [
        "https://leetcode.com/*",
        "https://*.leetcode.com/*"
      ],
      "js": [
        "content/leetcode.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "exclude_matches": [
        "https://leetcode.com/*",
        "https://*.leetcode.com/*",
        "https://leetcode.cn/*",
        "https://*.leetcode.cn/*",
        "https://github.com/*",
        "https://gist.github.com/*",
        "https://gitlab.com/*"
      ],
      "js": [
        "content/technical.js"
      ],
      "run_at": "document_idle"
    }
  ]
}