Downloading and installing javadocs is a painful task and sometimes it is not possible due to the javadoc is not always available to be downloaded.

This script is perfect when you are offline, and you don't have to download and install javadoc offline version.

Google Gears only runs in older browsers like Firefox 3.0, but it is still a good option to have a Firefox 3.0 just for this task.

Maybe the code can be updated to use HTML 5 local store or Indexed DB