Examine source code of File Previewer

{
  "manifest_version": 3,
  "name": "File Previewer",
  "version": "1.0.1",
  "description": "Preview CSV, NPY, and ZIP files directly in your GitHub side panel without any external tools and file download, along with theme support.",
  "author": "Jenil Prajapati",
  "homepage_url": "https://github.com/jenil1236/FilePreviewer_Extension-Issues",
  "browser_specific_settings": {
    "gecko": {
      "id": "file-previewer@jenilprajapati.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "scripting",
    "unlimitedStorage"
  ],
  "sidebar_action": {
    "default_panel": "index.html",
    "default_icon": "extensionLogo32.png",
    "default_title": "File Previewer"
  },
  "action": {
    "default_title": "Use Ctrl+Shift+F (Cmd+Shift+F on Mac) to open sidebar",
    "default_icon": {
      "16": "extensionLogo16.png",
      "32": "extensionLogo32.png",
      "48": "extensionLogo48.png",
      "128": "extensionLogo128.png"
    }
  },
  "background": {
    "scripts": [
      "src/background/service-worker.js"
    ],
    "type": "module"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+F",
        "mac": "Command+Shift+F"
      }
    }
  },
  "host_permissions": [
    "https://github.com/*",
    "https://raw.githubusercontent.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*"
      ],
      "js": [
        "src/content/content-script.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "extensionLogo16.png",
    "32": "extensionLogo32.png",
    "48": "extensionLogo48.png",
    "128": "extensionLogo128.png"
  }
}