Examine source code of Rikaitan

{
  "manifest_version": 3,
  "name": "Rikaitan Popup Dictionary",
  "version": "25.9.16.0",
  "description": "Popup dictionary for language learning by AJATT",
  "author": "Ajatt-Tools",
  "icons": {
    "16": "images/icon16.png",
    "19": "images/icon19.png",
    "32": "images/icon32.png",
    "38": "images/icon38.png",
    "48": "images/icon48.png",
    "64": "images/icon64.png",
    "128": "images/icon128.png"
  },
  "action": {
    "default_icon": {
      "16": "images/icon16.png",
      "19": "images/icon19.png",
      "32": "images/icon32.png",
      "38": "images/icon38.png",
      "48": "images/icon48.png",
      "64": "images/icon64.png",
      "128": "images/icon128.png"
    },
    "default_title": "Rikaitan",
    "default_popup": "action-popup.html"
  },
  "background": {
    "page": "background.html"
  },
  "omnibox": {
    "keyword": "rikai"
  },
  "content_scripts": [
    {
      "run_at": "document_idle",
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ],
      "match_about_blank": true,
      "all_frames": true,
      "js": [
        "js/app/content-script-wrapper.js"
      ]
    }
  ],
  "minimum_chrome_version": "102.0.0.0",
  "options_ui": {
    "page": "settings.html",
    "open_in_tab": true
  },
  "permissions": [
    "storage",
    "clipboardWrite",
    "unlimitedStorage",
    "declarativeNetRequest",
    "scripting",
    "contextMenus"
  ],
  "optional_permissions": [
    "clipboardRead",
    "nativeMessaging"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "commands": {
    "toggleTextScanning": {
      "suggested_key": {
        "default": "Alt+Delete"
      },
      "description": "Toggle text scanning on/off"
    },
    "openInfoPage": {
      "description": "Open the info page"
    },
    "openSettingsPage": {
      "description": "Open the settings page"
    },
    "openSearchPage": {
      "suggested_key": {
        "default": "Alt+Insert"
      },
      "description": "Open the search page"
    },
    "openPopupWindow": {
      "description": "Open the popup window"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "popup.html",
        "js/*",
        "lib/resvg.wasm"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'; script-src 'self' 'wasm-unsafe-eval'; img-src blob: 'self'; style-src 'self' 'unsafe-inline'; media-src *; connect-src *"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tatsu@autistici.org",
      "strict_min_version": "115.0"
    },
    "gecko_android": {
      "strict_min_version": "115.0"
    }
  }
}