Why is macrumors showing different in Firefox than Safari?

[portreathbeach]

I just loaded macrumors.com in Firefox and saw this:



instead of what I am used to seeing (this is a shot from Safari):



I just tried it in Firefox on 2 other Macs and it works fine. Why is my Mac displaying macrumors.com like it is?

 

[sammich]

Firefox is showing the mobile site. Either you've set the user-agent to something to a mobile OS or you've previously selected to show the mobile site before in Firefox and it's remembered the setting.

 

[portreathbeach]

Thanks. Just spotted that at the bottom of the page. Why on earth did it suddenly change to Mobile mode?

Thanks again