Recently I’ve ran into a problem after I upgraded Firefox to the latest version and Selenium could not launch a new session. It turned out that Selenium has hardcoded Firefox version number and if your version of FF is greater than this number then it stops working and I got this wired error message: selenium [...]

In some instances you may find yourself trying to run functional test against application server that has fake SSL certificates (for example your test environment). In that case Selenium will give you headache since it will create and destroy custom Firefox profile for each test. Fortunately, you can use your own custom profile and run [...]