'Share `Selenium2Library`\'s cache of browsers, so that
we don\'t have to open a separate browser instance for the
`Run On Failure Keyword Only Called Once` test.'

def __init__(self, *args, **kwargs):

    super(CustomSeleniumKeywords, self).__init__(*args, **kwargs)
    s2l = BuiltIn().get_library_instance('Selenium2Library')
    self._browsers = s2l._browsers
