# Test `srcset` in Firefox!

## Getting Started

1. Download a nightly build of Firefox (33a1) from nightly.mozilla.org
2. Open the developer toolbar (shift + F2) or Tools > Web Developer > Developer Toolbar in your menu.
3. In the developer toolbar, enter `pref set dom.image.srcset.enabled true`

## `srcset` and `sizes` in action!

### `srcset`

#### `src="foo.jpg" srcset="bar.jpg 2x"`

#### `srcset="foo.jpg 1x, bar.jpg 2x"`