Question: I am getting error while using Firefox with WebDriver.

```
org.openqa.selenium.firefox.NotConnectedException: Unable to connect
to host 127.0.0.1 on port 7055 after 45000 ms.

```

* Firefox version:47.0
* Selenium:2.53.0
* Windows 10 64 bit

Is anyone getting a similar issue or any idea what is the solution for this? It's working fine with Chrome but with Firefox none of the URLs are getting loaded.

Answer: 
If you're on OSX using Homebrew, you can install old Firefox versions via brew cask:

```
brew tap goldcaddy77/firefox
brew cask install firefox-46 # or whatever version you want

```

After installing, you'll just need to rename your FF executable in the Applications directory to "Firefox".

More info can be found at the git repo [homebrew-firefox](https://github.com/goldcaddy77/homebrew-firefox). Props to [smclernon](https://github.com/smclernon) for creating the [original cask](https://github.com/smclernon/homebrew-firefox).
Its a FF47 issue
<https://github.com/SeleniumHQ/selenium/issues/2110>

Please downgrade to FF 46 or below (or try out FF48 developer <https://developer.mozilla.org/en-US/Firefox/Releases/48>)

Instructions on how to downgrade:
<https://www.liberiangeek.net/2012/04/how-to-install-previous-versions-of-firefox-in-ubuntu-12-04-precise-pangolin/>
Or if you are on Mac, as suggested by someone else in this thread use brew.