So I'm trying to write a suite of tests using Selenium WebDriver in Ruby for our web application, but I can't even get into the application because of SSL certificate issues in Firefox. Our application is deployed on a local server, and uses a self-signed SSL Certificate for testing/development. When you're simply using the browser manually, you can tell Firefox to set a security exception, and store it permanently, which works fine. This isn't really a possibility using Selenium. First off, the tests fail before I would be able to set the permanent exception. Secondly, the moment I set the exception, Selenium forgets it and displays the screen again.

I've already tried creating a custom profile with `firefox -p` and adding the exception in that profile and loading it up via Selenium, but Selenium doesn't seem to respect that exception. I also tried setting various profile parameters to get it to ignore or accept the certificate, but Selenium appears to ignore those profile parameters as well. Finally, I made Selenium add an extension that skips the invalid certificate screen, but it still doesn't work. Here's my code:

```
require 'rubygems'
require 'selenium-webdriver'

profile = Selenium::WebDriver::Firefox::Profile.from_name "Selenium"

profile.add_extension("./skip_cert_error-0.3.2-fx.xpi")
profile["browser.xul.error_pages"] = "false"
profile["browser.ssl_override_behavior"] = "1"

driver = Selenium::WebDriver.for(:firefox, :profile => profile)

```