Search pages doesn't following divice width

I’ve found F-Droid search pages having a problem on mobile phones. Most pages at D-Droid are pesponsive for device screen width, however search pages doesn’t following the screen, they just scaled on screen. Who can fix that?

See my screenshots:



My user agent: Mozilla/5.0 (Android 7.0; Mobile; rv:68.0) Gecko/68.0 Firefox/68.0