Firefox Version

53.0.2

Selenium Version

3.4.1

Geckodriver Version

0.16.1

Platform

Linux, Ubuntu 16.04

Steps to reproduce -

Attempting to use the CONTEXT_CHROME feature in selenium. A trivial example from IDLE:

d=webdriver.Firefox()
d.set_context('chrome')
urlbar=d.find_element('id','urlbar')
urlbar.send_keys('http://google.com') #from this point on, the browser basically stops responding
go=d.find_element('id', 'urlbar-go-button')
go.click()
urlbar.send_keys('http://google.com')

Nothing showing up in the geckodriver.log:
1494946407069 geckodriver::marionette INFO Starting browser /usr/lib/firefox/firefox.sh with args ["-marionette"]
1494946415160 Marionette INFO Listening on port 32864
1494946415337 Marionette WARN TLS certificate errors will be ignored for this session

Again, this is a trivial example, the larger purpose is to test/automate sites with security device logins, certificates, etc.

Thanks for any help you can offer.