First, double check that you have the right files in the right places: borderify/ icons/ border-48.png borderify.js manifest.json Installing. In Firefox: Open the about:debugging page, click "This Firefox" (in newer versions of Firefox), click "Load Temporary Add-on", then select any file in your extension's directory. Default download location per file type add-on? Help I'm trying to set up my friend's computer so that all mp4 and webm files go to a specified folder, and all other files to the Download folder, however I can only seem to find one add-on that will do this (Automatic Save Folder) and it doesn't appear to do almost anything at all.
Continue reading