title: Expected browser binary location, but unable to find binary in default location, no 'moz:firefoxOptions.binary' capability provided using GeckoDriver
body: <pre><code>from selenium import webdriver;
  browser= webdriver.Firefox();
  browser.get('http://www.seleniumhq.org');
  </code></pre>
  <p>When I try to run this code, it gives me an <code>error message</code>:</p>
  <pre><code>Expected browser binary location, but unable to find binary in default location, no 'moz:firefoxOptions.binary' capability provided, and no binary flag set on the command line.
  </code></pre>
  <p>Any thoughts-highly appreciated!</p>