Hi, we are still waiting for the Firefox support of service workers.
As of today, Firefox still does not support background.service_worker. But the Firefox developers are working on it. As soon as the Firefox extension team closes this open bug, we can release a new version of Ui.Vision for Firefox.
In the meantime, the current Ui.Vision for Firefox lacks the newest RPA features but otherwise continues to work fine. The only known open issue is the “Paste from Clipboard” bug in Firefox. We plan to have a smaller release (still MV2 based) in a few weeks that solves this one.