Rollout Action Bar Changes to All Users

We have developed a simple web applet to be added to the Action Bar of our users.

I understand that if the users have customised their Action Bar they will need to manually do this, but the majority would not have changed their default settings.

How can I make the new web applet appear as the first section in the Action Bar by default.  I am unable to find documentation on how to roll out web applets to the Action Bar without getting the users to manually do it themselves.