A read-only copy of the current Selenium scripts can be downloaded using bzr with:
bzr co bzr://bzr.mozilla.org/bugzilla/qa/34.60
A read/write copy can also be downloaded with:
bzr co bzr+ssh://''login''@bzr.mozilla.org/bugzilla/qa/34.60
where ''login'' is your LDAP account. All available releases are listed [http://bzr.mozilla.org/bugzilla/qa/ here].