> For the complete documentation index, see [llms.txt](https://testingvn.gitbook.io/playwright/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://testingvn.gitbook.io/playwright/implement-test-cases/open-browser.md).

# Open Browser

Configure projects for multiple browsers

By using **projects** you can run your tests in multiple browsers such as chromium, webkit and firefox as well as branded browsers such as Google Chrome and Microsoft Edge. Playwright can also run on emulated tablet and mobile devices. See the [registry of device parameters](https://github.com/microsoft/playwright/blob/main/packages/playwright-core/src/server/deviceDescriptorsSource.json) for a complete list of selected desktop, tablet and mobile devices.

```typescript
import { defineConfig, devices } from '@playwright/test';

export default defineConfig({
  projects: [
    {
      name: 'chromium',
      use: { ...devices['Desktop Chrome'] },
    },

    {
      name: 'firefox',
      use: { ...devices['Desktop Firefox'] },
    },

    {
      name: 'webkit',
      use: { ...devices['Desktop Safari'] },
    },

    /* Test against mobile viewports. */
    {
      name: 'Mobile Chrome',
      use: { ...devices['Pixel 5'] },
    },
    {
      name: 'Mobile Safari',
      use: { ...devices['iPhone 12'] },
    },

    /* Test against branded browsers. */
    {
      name: 'Microsoft Edge',
      use: {
        ...devices['Desktop Edge'],
        channel: 'msedge'
      },
    },
    {
      name: 'Google Chrome',
      use: {
        ...devices['Desktop Chrome'],
        channel: 'chrome'
      },
    },
  ],
});
```