Revert "Test: As a last resort, try waiting for ajax requests"

This reverts commit 76218b57553ab9fb3819888ac363eee4ef25ef37.
Revert "Test: Set ajax timeout to 10 seconds"

This reverts commit 29bdfddca43fb5db7831f7b376eb9d6478db7e3c.
Travis CI: Try to find out what Firefox I'm using