It gives you more information about all domains and translated mo files loaded in the actual installation, so you can debug what's the problem with a plugin, theme, etc.
Only shows the debug info if you're logged in in the footer.
You'll have a info of all plugins loaded, textdomain used, if file is found and then the path where is the function of theme or plugin loaded. You can see the screenshots.
Developers
Links
תוסף זה זמין להורדה ולשימוש דרך שברשותך.