Go to ‘External files’, and click on the +ADD FILE button.
File nameFilename: You can provide a name for the file. For example, “Delete Cookies”.
File URL: Here you can specify the location of the file path.
File scope: Here you can choose if you want this script to run
Outside outside and inside of form dialogdialogue
Outside outside form dialog dialogue only, orInside
inside form dialog dialogue only
Click on the ‘ADD FILE’ button in the bottom right corner of the page.