If your organization has a premium Wranggle plan, use their custom version of the Wranggle browser extension:
Software developers creating their own automations for personal use (without distribution) may use the free version:
During Developer Preview 1, Wranggle is only available for Google Chrome and the related Chromium and Chrome Canary browsers.
A Firefox add-on should be available soon after Developer Preview 1. The order for the remaining browsers will be based on feasibility.