Does what it says. Dunno what that other guy was saying about it being malicious but you can check for yourself by right-clicking 'Add to Firefox' and saving the link and throwing it into virustotal. In case you're lazy, virustotal reported Lumo by Proton Sidebar (v1.2) as "a simple wrapper" and "There is no executable JavaScript, background scripts, or other active code logic within the extension package itself. The extension's sole purpose is to display the Lumo by Proton web service in a browser sidebar." Appreciate the extension Daskashk :)

Works flawlessly! 👍

This add-on displays the Lumo AI website in the sidebar. That's why it offers the exact same behavior and functionality as the website does.