Can't open browser with Selenium after Firefox update

Question

I use Selenium WebDriver on Ubuntu Desktop 16.04, and I can\'t open browser. I get the following error after Firefox update (before this, it all worked):

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Answer 1

FIXED: Solution at this time is to downgrade Firefox! run this command to get a list of available Firefox versions.

apt-cache show firefox | grep Version

My Result:

Version: 47.0+build3-0ubuntu0.16.04.1
Version: 45.0.2+build1-0ubuntu1

Install:

sudo apt-get install firefox=45.0.2+build1-0ubuntu1

To keep this version and disallow updates:

sudo apt-mark hold firefox

If you want to unhold firefox version and allow updates:

sudo apt-mark unhold firefox
sudo apt-get upgrade