You can reset your sync data for any extension in Firefox. Just go to about:debugging, click on "This Firefox", locate the extension and click the "Inspect" bu

You can reset your sync data for any extension in Firefox. Just go to about:debugging, click on "This Firefox", locate the extension and click the "Inspect" button. In the case of MAC this should lead you to about:devtools-toolbox?type=extension&id=%40testpilot-containers In the devtools that open you need to go to the Console tab and run this command: await browser.storage.sync.clear() If you want to see the data before you delete it, you can show it with this command: await browser.storage.sync.get()