Firefox

1. Download the .xpi file.

2. Load in Firefox:

   i. Open Firefox and type about:debugging in the address bar.

   ii. Click This Firefox on the left sidebar.

   iii. Click Load Temporary Add-on....

   

   iv. Navigate to the downloaded .xpi file and select it.

   v. You should now see a new entry under Temporary Extensions with the name Inspect Punchout.