Examine source code of re/read - read offline, translate and learn

{
  "manifest_version": 3,
  "name": "re/read - read offline, translate and learn",
  "short_name": "re/read",
  "version": "0.5.46",
  "description": "__MSG_extension_description__",
  "default_locale": "en",
  "homepage_url": "https://github.com/fundacja-reborn/reread-webext",
  "browser_specific_settings": {
    "gecko": {
      "id": "@reread-webext-reapps-eu",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "icons": {
    "48": "assets/icons/icon.svg",
    "96": "assets/icons/icon.svg"
  },
  "content_security_policy": {
    "extension_pages": "default-src 'none'; script-src 'self' 'wasm-unsafe-eval'; worker-src 'self'; style-src 'self'; img-src 'self' data: blob:; font-src 'self'; connect-src 'self' https:; object-src 'none'; form-action 'none'"
  },
  "permissions": [
    "storage",
    "unlimitedStorage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background/index.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/index.js"
      ],
      "css": [
        "content/highlight.css"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "action": {
    "default_title": "re/read",
    "default_popup": "popup/index.html",
    "default_icon": "assets/icons/icon.svg",
    "theme_icons": [
      {
        "light": "assets/icons/icon-light.svg",
        "dark": "assets/icons/icon-dark.svg",
        "size": 16
      },
      {
        "light": "assets/icons/icon-light.svg",
        "dark": "assets/icons/icon-dark.svg",
        "size": 32
      }
    ]
  },
  "commands": {
    "open-reader": {
      "suggested_key": {
        "default": "Alt+Shift+R"
      },
      "description": "__MSG_open_reader__"
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  }
}