Examine source code of Bionic Reading

{
  "manifest_version": 3,
  "name": "Bionic Reading",
  "version": "0.1.0",
  "description": "Apply bionic reading formatting to selected text or entire sites.",
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "contextMenus"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Bionic Reading",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "shared/api.js",
        "shared/engine.js",
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "commands": {
    "apply-selection": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y",
        "mac": "Command+Shift+Y"
      },
      "description": "Apply bionic reading to selected text"
    },
    "toggle-site": {
      "suggested_key": {
        "default": "Ctrl+Shift+U",
        "mac": "Command+Shift+U"
      },
      "description": "Toggle bionic reading on current site"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "bionic-reading@example.local",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}