You can install the official minzo.link add-on directly from Mozilla’s official store:
Visit Firefox Add-ons
Open Firefox and go to the official Firefox Browser ADD-ONS (AMO) store, or click the Firefox direct link on our website.
Find Minzo - URL Shortener
Search for Minzo - URL Shortener and open the extension page.
Add to Firefox
Click the blue "Add to Firefox" button.
Confirm Permissions
A drop-down prompt will appear below your address bar asking for permission. Click "Add" to confirm.
Pin to Toolbar (Optional)
Click the puzzle piece icon (Extensions menu) in the top-right toolbar, click the gear icon next to minzo.link, and select "Pin to Toolbar" for one-click access.
Start Shortening
Click the minzo.link icon anytime to instantly shorten your active tab's URL or generate a QR code.