How to fix the Firefox Security error when attempting to print?

How to fix the Firefox Security error when attempting to print?

How to fix the Firefox Security error when attempting to print?

Be sure to disable the insecure HTTP download block globally by going to about:config in the address bar and changing dom.block_download_insecure to false.

Step1: Enter the address  "about:config"

Step 2: Click Accept the risk and continue

Step 3: Click show all

Step 4: Locate and click the switch arrow icon