When viewing a google docs spreadsheet in a mobile browser you have handy filter buttons at the top. How do I display mobile version of the page in a desktop browser? Preferrably Firefox. Edit: I seek to display only google docs spreadsheets that way while displaying non-mobile versions of other websites at the same time. So changing the UA globally won't work.
I found a solution through some URL tweaking: changing the document link URL from docs.google.com/spreadsheet/ccc?key=... to docs.google.com/spreadsheet/lv?key=... displays the spreadsheet with the desired filter buttons. The "list view" mode can also be toggled from the view menu in spreadsheets when logged in.
I accept Karan answer since it is one solution to my original (unclear) question.