hello, you can try one of the file manager apps at https://marketplace.firefox.com/search?q=file+manager

after downloading same from market place still i am not getting file manager.

Hi sanatankumarsahu,

Was the download of the File Manager application successful? If so, an icon for the application should have been added to your Home Screen.

Make sure you swipe to the left/right until you find the newly downloaded application.

If you dislike that specific File Manager, you may download and test different file manager applications from the link that Philipp provided.

Thanks,

- Ralph