I use firefox 109.01 on ubuntu 22.04 (snap package) and i downloaded text file successfully and firefox indicated that the file downloaded successfully and didn't change the location of the file , then after two or three days i opened the downloads in firefox and it showed me that the file is failed download and i have the choice to click on retry download then i checked the file and the file is not corrupted. so what are the possible reasons for that and how to fix this problem. thanks.