binary = FirefoxBinary('D:\\Browsers\\FirefoxPortable\\FirefoxPortable.exe')
driver = webdriver.Firefox(executable_path="C:\\geckodriver.exe", firefox_binary=binary)
driver.get('google.ru')

selenium.common.exceptions.WebDriverException: Message: The browser appears to have exited before we could connect. If you speci
fied a log_file in the FirefoxBinary constructor, check it for details.

from scrapy.exporters import CsvItemExporter
class MyCsvItemExporter(CsvItemExporter):
    def __init__(self, file, **kwargs):
        super(MyCsvItemExporter, self).__init__(file, ensure_ascii=False, **kwargs)

FEED_EXPORTERS = {
    'csv':'iherb_bot.settings.MyCsvItemExporter'
    }