import { type BrowserContext } from "playwright";
export declare function getBrowserCacheDir(): string;
export declare function getSystemChromePath(): string | null;
export declare function getDownloadedChromiumPath(): string | null;
export declare function isSystemChrome(browserPath: string | null): boolean;
export declare function getChromeProfileDir(chromeRoot: string): string | null;
export declare function supportsSystemChromeCookieImport(): boolean;
export declare function importChromeCookies(userDataDir: string, browserPath: string | null): void;
export declare function resolveBrowserPath(): string;
/**
 * The pid still holding a Chromium profile, or null when nothing holds it.
 *
 * Chromium writes `SingletonLock` as a symlink whose target is
 * `<hostname>-<pid>`, and the hostname itself may contain dashes, so only the
 * final segment is the pid. A lock pointing at a dead process is stale.
 */
export declare function readProfileLockOwner(lockPath: string, isRunning?: (pid: number) => boolean): number | null;
/**
 * The major version of the browser at `browserPath`, or null when it cannot
 * be read. `--version` prints e.g. `Google Chrome 153.0.8010.48`; on Windows
 * it prints nothing, so an undetectable version is an expected outcome.
 */
export declare function readBrowserMajorVersion(browserPath: string | null, readVersion?: (executable: string) => string): number | null;
/**
 * The user agent to present, or undefined to leave the browser's own.
 *
 * Headless Chromium announces itself as `HeadlessChrome`, which sites block,
 * so the user agent is overridden. The override must carry the version of the
 * browser actually running: sites that enforce a supported-browser floor
 * (Slack answers 403 "your browser is not supported") reject a stale one, and
 * a version that disagrees with the client hints is itself a bot signal. The
 * string follows Chrome's reduced format, where only the major version varies.
 */
export declare function buildUserAgent(majorVersion: number | null, headless: boolean, platform?: NodeJS.Platform): string | undefined;
export declare function launchPersistentContext(userDataDir: string, headless: boolean, browserPath: string | null): Promise<BrowserContext>;
export declare function getDefaultUserDataDir(slug: string): string;
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