commit dfab927 contains a reference to basestring, which is not in Python 3 #1820

FROM ubuntu:trusty
ENV DEBIAN_FRONTEND noninteractive
RUN apt-get update -qq
RUN apt-get install -qq build-essential python3-pip
RUN apt-get install -qq firefox
RUN pip3 install -U selenium
RUN pip3 list
COPY repro.py /seleniumtest/
CMD /seleniumtest/repro.py

#!/usr/bin/python3
from selenium import webdriver
webdriver.Firefox()

docker build -t repro .
docker run -t -i  repro

Traceback (most recent call last):
  File "/seleniumtest/repro.py", line 3, in <module>
    webdriver.Firefox()
  File "/usr/local/lib/python3.4/dist-packages/selenium/webdriver/firefox/webdriver.py", line 62, in __init__
    firefox_options.binary_location = self.binary if isinstance(self.binary, basestring) else self.binary._get_firefox_start_cmd()
NameError: name 'basestring' is not defined