ben kuramadım yha install yaparken hata alıyorum

install yaparken

Script could not be installed [Exception... "Component returned failure code: 0x80520012 (NS_ERROR_FILE_NOT_FOUND) [nsIChannel.open]" nsresult: "0x80520012 (NS_ERROR_FILE_NOT_FOUND)" location: "JS frame :: chrome://greasemonkey/content/utils.js :: getContents :: line 244" data: no]
hatası alıyorum