claim: Firefox is an operating system shell.
evidence: Aleksandr Vasilyevich Molodtsov -LRB- Александр Васильевич Молодцов born March 1 , 1962 -RRB- is a retired Russian professional footballer .. He made his professional debut in the Soviet Top League in 1980 for FC Dynamo Moscow .. FC Dynamo Moscow. FC Dynamo Moscow. Soviet Top League. Soviet Top League