Bug 888804 Converting the test-firefox-windows.js file to use the new test framework r=@jsantell

(cherry picked from commit 3b934529fb0b5c8158d71510e0671211b9bd4f12)
(cherry picked from commit 907e07080bc3316d79b0e909e1fd1b476a357152)
Bug 888804 Using RegExp(title).test(window.title) (for Linux and Windows)
Bug 888804 Handling review comments
Merge pull request #1178 from erikvold/888804

Bug 888804 Converting the test-firefox-windows.js file to use the new test framework r=@jsantell