Opera Software has seen daily downloads of its browsers in European countries as much as triple after Microsoft started to give consumers greater access to rival browsers.

We see significant increase in our user base ... overall we have to say we are satisfied, Opera co-founder Jon von Tetzchner said at the Reuters Global Technology Summit on Thursday.

Opera is the fourth-largest browser in Europe after Microsoft's Internet Explorer, Mozilla's Firefox and Google's Chrome.

(Editing by James Regan)