By Joachim Dagenborg OSLO (Reuters) – Microsoft has agreed to install Opera Software’s Internet browser on low and mid-market mobile phones it inherited from Nokia, potentially putting Opera Mini on another 100 million phones year. The deal comes after Microsoft completed its $7.5 billion takeover of Nokia’s handset business in April and announced it would cut 18,000 jobs as part of its efforts to halve the size of the Nokia phone business. “This is a great agreement for us, and something we have been dreaming of for 10 years and now it’s finally happening,” Opera Chief Executive Lars Boilesen said. It declined to estimate the expected volume, but a source close to the agreement said Opera Mini could now be installed on an additional 100 million handsets a year.