Can't re-size this webpage??

[Monsieur]

Difficult to see the information I need - how can I make the actual info bigger...fill the screen??
Works fine at work

 

[SlowJohn]

Ctrl + and Ctrl - let you zoom in and out.

Does that help?

 

[Monsieur]

Ctrl + and Ctrl - let you zoom in and out.

Does that help?

No, just makes it larger by a couple of centimetres
This is the only site that does this, even at work its fine

 

[Monsieur]

Just tried the same page on explorer and it works fine - just not on firefox where every other website works ok