Which mobile browser uses the most data? I have a choice of 3, opera, chrome or Firefox. I am limited to 1gb a month on my European SIM contract and don't want to use more than I need to. I use Wii fi when I can while abroad, I only ever use it in my smartphone. I download films while on Wii fi to transfer to my pc. I try to use the bandwidth management on settings when I remember. I never use utube as and the like while on packet data. Advise on this appreciated please?.