Firefox web browser is most commonly used in IT industry and if you want to change the default Download folder of your Firefox web browser to make the access easy to downloaded files then follow the steps written below to make settings in your Firefox web browser according to your choice.
Open Firefox, click on “Tools” menu > “Options”
Click “General” tab and under “Downloads” section select the radio button followed by “Save files to” then click “Browse” button
Here select a folder from your system which you want to set as Downloads folder for Firefox and click “OK” button
At the end click “OK” button on the opened window to make the change effective.