Scroll down to the “ Files and Applications” section. Now by default, you will be in the General tab.Select the Settings option from the pop-up menu.Open your FireFox browser and click on the burger icon given on the right top side.Well, changing the Mozilla FireFox default download folder on Windows, macOS or Linux is not a difficult task.This means, configuring a folder or location in Mozilla FireFox, where you want it to save the file automatically without asking for your permission whenever you download something. If you don’t want to enable FireFox to ask your permission to save the files every time then we can change its default download directory.