export type Channel = 'stable' | 'canary' | 'beta' | 'dev';
/** Absolute path to the DevToolsActivePort file for a channel / explicit profile dir. */
export declare function getPortPath(channel?: Channel, userDataDir?: string): string;
/**
 * Parse a DevToolsActivePort file body. Format is two lines:
 *   <port>
 *   <ws-path>   e.g. /devtools/browser/4fd90b22-...
 * Returns the browser-level ws:// endpoint.
 * @throws if the body is malformed.
 */
export declare function parsePortFile(content: string): string;
/** Read the port file and build the ws:// browser endpoint, with a helpful error. */
export declare function buildWsEndpoint(channel?: Channel, userDataDir?: string): string;
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