| Index: README.md | 
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| ### Running the browser tests in a real browser | 
|  | 
| The tests under `test/browser` require a browser environment. `npm test` will | 
| run these in a headless browser, with each module being loaded in a new frame. | 
|  | 
| The default is to run in both Chromium (using the remote interface) | 
| and Firefox. You can select which runners to use by setting the | 
| BROWSER_TEST_RUNNERS environment, the default is | 
| -"chromium_remote". Possible values (separated by a ',') are: | 
| +"chromium_remote,firefox". Possible values (separated by a ',') are: | 
|  | 
| - "chromium_remote": Chromium 60 (using the remote interface) | 
| - "chromium": Chrome 63 (using WebDriver) | 
| -- "firefox": Firefox 56 (using WebDriver) | 
| +- "firefox": Firefox 57 (using WebDriver) | 
|  | 
| You can not set a specific version of the browser at runtime. | 
|  | 
| Linting | 
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|  | 
| You can lint the code using [ESLint](http://eslint.org). | 
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|  |