Set Up the Browser Extension
Overview
The Omniconvert Explore browser extension (sometimes called the A/B Editor) is what lets you visually edit your experiment variations without writing code. It also includes a built-in Debugger for checking what's happening with your experiments directly on your website.
The Visual Editor will not work without this extension installed. If you're setting up your first experiment, install this before you try to create a variation.
Step 1 - Install the extension
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Download the extension from the Chrome Web Store.
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Add it to your browser and confirm the permissions it requests.
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Once installed, click the Extension button in your browser toolbar to see it.

Pin the extension to your toolbar so it's always visible and easy to access. Most browsers let you do this by clicking the puzzle-piece icon in the toolbar and selecting the pin next to the Omniconvert extension.
What's inside the extension
Visual Editor
Once the extension is installed, the Visual Editor becomes available automatically whenever you add a variation to an experiment. You don't need to configure anything separately - it just works once the extension is active.
See Use the Visual Editor for the full guide to editing variations.
Debugger
The Debugger shows you what Explore is actually doing on the current page - which experiments are active, which variation a visitor has been bucketed into, and whether goals are firing correctly. It's the fastest way to check whether something is working as expected without guessing.

This article only introduces what the Debugger shows. For a full walkthrough of using it to diagnose a specific problem - like an experiment not running or a goal not firing - see Debug an Experiment in Troubleshooting.