jenkins cannot run firefox: No protocol specified Error: cannot open display: :0

Question

I have installed jenkins as a service on linux mint. I am trying to run tests written in python and script cannot run firefox. This line is a problem.

... self.browser = webdriver.Firefox() ...

When i log in as jenkins user, i can't run firefox. getting this error :

(process:3758): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed No protocol specified No protocol specified Error: cannot open display: :0

Firefox works when i run it from my (logged in) user.

possible duplicate of [Error: cannot open display: :0 for Selenium tests](http://stackoverflow.com/questions/22773363/error-cannot-open-display-0-for-selenium-tests) — Gerold Broser, Jun 08 '15 at 11:09

score 2 · Accepted Answer · answered Jun 08 '15 at 11:21

Just install a virtual framebuffer in your machine and it will work.
Now i'm using Xvfb, but there are many others.
Here is some tutorials to setup your machine:

Also, there is this plugin: https://wiki.jenkins-ci.org/display/JENKINS/Xvfb+Plugin

I resolved this with using selenium grit. Thank you all. – igor Jun 08 '15 at 11:59 — igor, Jun 08 '15 at 11:59

jenkins cannot run firefox: No protocol specified Error: cannot open display: :0

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