The Selenium framework is built using Ruby and Selenium/Webdriver tools. It can execute scripts using Ant commands and allows prioritizing scripts by tag names. The framework integrates with Hudson by configuring and executing test runs via a Hudson job using the Ant buildfile and its targets. A Hudson job is configured by selecting triggers, build scripts, collecting artifacts/results, and notifications. Hudson then executes the job and the results can be analyzed on iAnalyze.