One of the IGEL Community members posted an interesting question about enabling the Firefox Developer Tools when pressing F12. Apparently this was working under older versions of the IGEL OS.
Create a new Profile
System > Firmware Customization > Custom Commands > Desktop
Enable ‘Before Desktop Start’
Enter: sed -i /services/fbrw/firefox/distribution/policies.json -e ‘s#DisableDeveloperTools”: true#DisableDeveloperTools”: false#’
Assign Profile to IGEL device or Folder