To simplify delivery of beta versions of plugins to interested users, the Jenkins project published an experimental update center. It includes alpha and beta versions of plugins, which aren’t usually included in the regular update center.
Plugin releases that contain
beta in their version number will only appear in the experimental update site, not in the regular update center.
The experimental update center also serves regular releases.
Newer releases hide older releases in all update centers.
For example, the release of version
1.4 will hide
1.3-beta-2 from the experimental update center.
Note that only
beta strings in the version number will publish to the experimental update center.
Other version strings like
unstable will appear in the regular update center.
Users who are interested in downloading experimental plugin releases can go to Plugin Manager, then to the Advanced tab, and configure the update center URL
Submit, and then select Check Now.
Experimental plugin updates will be marked as such on the Available and Updates tabs of the Plugin Manager.
Once you install the beta plugins that you wanted, you can switch back to the default
https://updates.jenkins.io/update-center.json update center URL.