# Breakpoint (run step-by-step)

You can run a test until a certain point and then pause, so that you can investigate what you need using in-browser [Chrome debugging tools](https://docs.bugbug.io/debugging-tests/debug-in-chrome).

## Run step-by-step

BugBug supports step-by-step execution of the tests. To do this, click `Run and stop here` between steps. This will activate the **paused mode**. In this mode, you can run a test step-by-step and completely control an execution process.

<figure><img src="https://3168433179-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MKixgeBPbLvnD0l1eiV%2Fuploads%2FS3kJzqmnhiVm4qNcNxvs%2Fimage.png?alt=media&#x26;token=b75f3e10-e12f-4eac-958f-7175fb7553e8" alt=""><figcaption><p>To enable step-by-step execution, click on the "Run and stop here" action.</p></figcaption></figure>

<figure><img src="https://3168433179-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MKixgeBPbLvnD0l1eiV%2Fuploads%2FgRMEhR3OE8GDyA7yPW99%2Fimage.png?alt=media&#x26;token=8dc448ef-672b-46d4-8e5c-91a39477005b" alt=""><figcaption><p>Paused mode. To execute next step click on the "Run next step and pause" icon</p></figcaption></figure>

When a test is paused, a browser window with a test will display BugBug's overlay with options to control the execution process.

<figure><img src="https://3168433179-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MKixgeBPbLvnD0l1eiV%2Fuploads%2Fwvgnn4Ehlc3VbdPewBRD%2Fimage.png?alt=media&#x26;token=46d07999-34bd-41bb-9552-5b9b8caf08e9" alt=""><figcaption><p>Paused mode in a window with a test. BugBug's overlay has options to control the execution process</p></figcaption></figure>

BugBug allows you also to rewind or fast-forward the execution process. You can read more about it here [edit-and-rewind](https://docs.bugbug.io/workflow-tips/edit-and-rewind "mention")


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