CAT 
Mozilla’s macOS Firefox browser stores cached files on your Startup Disk and can take up space. This is how to reset Firefox to get back some of that consumed storage.
When you run the Mozilla Foundation’s Firefox web browser on your Mac, it creates a profile folder and configuration files in ~/Library/Application Support/Firefox.If you open that folder in the Finder, you’ll see something similar to the following:
When you run the Mozilla Foundation’s Firefox web browser on your Mac, it creates a profile folder and configuration files in ~/Library/Application Support/Firefox.If you open that folder in the Finder, you’ll see something similar to the following:
How to clear and reset Firefox’s profile folder on macOS
How to clear and reset Firefox’s profile folder on macOS
