Unable to determine the current version of FireFox after updated to 28.0

Question

When I run my Selenium tests with Firefox 28.0 I get:

"An exception of type 'OpenQA.Selenium.WebDriverException' occurred in WebDriver.dll but was not handled in user code

Additional information: Unable to determine the current version of FireFox using the registry, please make sure you have installed FireFox correctly"

I successfully ran tests yesterday with Firefox.

I think Firefox auto-updated to 28.0 since yesterday.

Today I'm getting the above error.

I uninstall Firefox and reinstalled but I still get the same exception.

Selenium 2.40 Firefox 28.0 Gallio and MbUnit 3.4

Any ideas on how to fix? I suppose I could switch to IE for testing.

Ed

Answer 1

The error was generated on the call to FireFoxBinary() constructor.

 DriverObj = New FirefoxDriver(New FirefoxBinary(), New FirefoxProfile(), TimeSpan.FromMinutes(10))

The call to FirefoxBinary worked for three weeks so I'm not sure why it decided to fail yesterday. Perhaps it was the auto-update by Firefox from 27 to 28.

The solution was to add the file path to the Firefox binary:

 DriverObj = New FirefoxDriver(New FirefoxBinary("C:\Program Files (x86)\Mozilla Firefox\Firefox.exe"), New FirefoxProfile(), TimeSpan.FromMinutes(10))

Answer 2

One possible solution to this would be to manually add the registry key that is being searched for. Normal FireFox builds (non ESR) appear to place a key titled "CurrentVersion" with a string value of the version in the

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Mozilla\Mozilla FireFox

directory. Testing has shown me that when I place a key similar to this but with a string value of the ESR version installed on my system in this location Selenium will work. The caveat is that as this question is rather old I have tested with Selenium 3.0.1. If you would like to try this the your registry key should look like this without the quotes:

Name = "CurrentVersion" and 
Value = "45.6.0 ESR (x86 en-US)"

Please keep in mind that this solution will get you by in a pinch, but each time ESR updates you will need to go in and update the key value.