Selenium 2.33.0 and Firefox 21
I haven't removed Firefox 19 since it used by as the DEFAULT_FIREFOX_VERSION(for both our grid and Saucelabs)
Merge pull request #104 from AlinT/firefox21andsel233

Selenium 2.33.0 and Firefox 21
Removed FF 19
Merge pull request #106 from AndreiH/removed_FF19

Removed FF 19
Changed to selenium 2.35.0
Updated to FF23 and ESR 17
Merge pull request #115 from AndreiH/sel2.35_FF23

Selenium 2.35 and FF23
Selenium 2.36 & FF 24