Hi   !
Have you tried this yet:
go to the 3-bar menu and click on the   '+'   (at the top of the menu)  
to zoom in .
If that doesn't work,   we'll have to try something else   ....

it isn't the size of the view it is the way it is arranged...like it's very basic

in the others (chrome, explorer) it has a main column, and then to each side are other sections of fb, eg events, pages to the left and to the right in it's own column is the feed of others, whos online, etc

Has something changed in the way the page is displayed,   or is it that you just want to change the default setting   ?

Found this for you: 'Websites look wrong or appear differently than they should'
        http://mzl.la/1BAQpkh
Sure hope this will fix your problem;   otherwise we'll just have to keep looking   .......