From d1efa6e0743636c17cd0ae1b55d5a5f868f68f14 Mon Sep 17 00:00:00 2001
From: Gary Rennie <gazler@gmail.com>
Date: Tue, 19 Sep 2017 15:18:54 +0100
Subject: [PATCH] Lock Firefox version to 54.0 for Travis CI tests

On Aug 31st 2017 Travis CI updated their default Linux version to 14.04
https://blog.travis-ci.com/2017-08-31-trusty-as-default-status

As a result, Firefox was updated to Firefox 55, which has headless
support, however, this version of Firefox does not appear to be working
with Travis CI. There is an issue being tracked at:
https://github.com/travis-ci/travis-ci/issues/8242

For now, the easiest fix is to lock the Firefox version.
---
 .travis.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 0cdf70a09..d736c9c99 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -29,3 +29,5 @@ cache:
   directories:
     - node_modules
     - deps
+addons:
+  firefox: "54.0"