Its not a firefox problem. In google you choosed french language as a default language. To change your language in Google - goto Google Accounts ->Language -> Change/Add Another Language and choose your language as a Primary language

Seems to have done the trick. Many Thanks for your input.

welcome

I have this problem on many sites, not just Google. One example I'm just fighting with: www.hp.com, on my macbook, goes to the normal english website; On my Ubuntu machine, insists on showing Finnish on any site that has Finnish available. I doubt this is a Firefox problem either, probably regional and language settings. But I'm still looking for that setting, everything in my regional and language settings says English and nothing says Finnish. So why is firefox redirecting me to Finnish sites if I want to see English?

You can check the order of the installed Languages.

• Edit > Preferences > Content > Languages