extension-develop/dist/webpack/plugin-extension/feature-manifest/manifest-overrides/common/sandbox.d.ts

The develop step of Extension.js

import { type Manifest, type FilepathList } from '../../../../webpack-types';
export declare function sandbox(manifest: Manifest, excludeList: FilepathList): {
    sandbox: {
        pages: string[];
        content_security_policy?: string | undefined;
    };
} | undefined;