When I look at The Great Outdoors SE using Firefox, my layout changes to fullscreen instead of a central column, which is common on the SE sites.

I'm using Firefox 58.0.2 (32-bits).

When I'm logged in on the same account using Edge, for example, it just looks fine.

Fullscreen layout

  • That is the mobile site.. scroll to bottom and click on full site – Suraj Rao Mar 7 '18 at 9:12

You've accidentally flipped the 'mobile' switch, so you're seeing the mobile site. Scroll to the footer and click 'full site':

enter image description here

The switch is set per-site, per-browser, that's why it only affected The Great Outdoors for you, and only on Firefox.

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