travis-ci/travis-build — pull request #339 by BanzaiMan (2014-11-13 22:34:28+00:00)
Title: Create symlink to newly-installed firefox

Some test runners may modify $PATH while they run, and invoking
firefox can result in surprising errors if they expect
certain version of firefox instead of the installed default.

So, instead, we overwrite the default firefox symbolic link.

You can see the simulated result here:

https://travis-ci.org/BanzaiMan/travis_production_test/builds/40940104