While it is running: the frame, stop and undo
What the page looks like mid-run, how to stop it, and what undo can reverse.
The frame
While a run is live the page carries a blue frame and a note saying what is being done right now. If the frame turns amber, Tabruns has stopped and is waiting for you back in the panel.
Stopping
There is a Stop control on the running step in the panel, and closing the panel or navigating away ends the run too. Whatever has already been done stays done — stopping is not a rollback.
Undo
Every finished run leaves a receipt with an Undo. It puts the fields Tabruns filled back the way it found them.
Undo is best-effort, and honestly so: it reverses what the site allows to be reversed. A form that has already been submitted, a page that has navigated away, a field the site has since recalculated — those are outside what any extension can put back.
Steps that did not work
A step that fails does not fail the run silently. You will see it named on the receipt with what happened — a control that was not where the page said it would be, or a page that did not respond in time. Those steps are skipped, and the run carries on.