Search:

it doesn't correspond to any stock sidebox. Logo Sidebox is an old plugin to display a logo in a sidebox. https://www.zen-cart.com/downloads.php?do=file&id=265

Seriously? You know why they are missing, we had a conversation about this and you fixed it on at least one site... Category tabs are hidden on mobile
and nobody cares that you think it is a bug...

you're in the correct thread, but the conversation has been partially derailed (you know who you are...)
The site in question has a pile of customizations on it. Seems a fair bit is hard-coded into...

...sigh

comparing apples to oranges pixelpadre...
Your one example page is a bootstrap html page and bootstrap is reponsive by default (no need to switch to the inspector to set device type, just resize...