Login Installation Firefox Excel Macro for Windows Macs Contributer Guide Vena Add-In – Additional Steps for Firefox If you are using Mozilla Firefox, a few additional configuration steps are required before installing the Vena Add-In 1. Open Mozilla Firefox and navigate to Options 2. In the Options pop-up window, navigate to the Security tab. In there, select General Exceptions 3. Add the following website as a trusted site: *.vena.io. 4. Visit Install the Vena Add-Infor next steps