**Feature summary** (what you would like to be able to do and where):
When working with special/interface pages of a MediaWiki, you often want to quickly go to another wiki and see how it is implemented there. It would be useful to implement this through the available ULS mechanism.
**Use case(s)** (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
* Open https://en.wikipedia.org/wiki/MediaWiki:Gadget-ProveIt.js
* Try to quickly find where else this gadget is available and how it is implemented.
* Open https://ru.wikipedia.org/w/index.php?title=Служебная:Домашняя_страница
* Try to quickly open enwiki Newcomers homepage
**Benefits** (why should this be implemented?):
This speeds up switching between projects to check code and special pages.