title: Prevent PhpStorm from opening new instance of Firefox browser
body: <p>I used to use <kbd>Shift + F1</kbd> shortcut in order to view official PHP documentation for functions (place caret on function name and press <kbd>Shift + F1</kbd>). PhpStorm used to open documentation in new tab of existing browser window (it is expected behavior for me). However recently for some reason it stopped working this way.</p>
  <p>Is there way to make PhpStorm open new browser tab instead of new browser window?</p>