People sit in Washington Square Park at New York University in New York, October 21, 2009.Amazon.com faced a backlash from the music industry after it introduced Cloud Drive, an online “music locker” that lets customers store music files on the company’s Web servers instead of their own hard drives and play them over an Internet connection directly from browsers and on phones running Google’s Android OS. Sony Music was upset by Amazon’s decision to launch the service without new licenses for music streaming.

Amazon’s Cloud Drive “is an amazing value and pretty easy to use”, but won’t kill rival Dropbox just yet, Business Insider’s Steve Kooch wrote. The Wall Street Journal’s Peter Kafka thinks Amazon’s cloud move isn’t earth shattering and “if you’re a music lover looking for a paradigm shift in the way you consume tunes, this won’t be it”.

Mozilla released its Firefox 4 Internet browser for Android phones, which allows desktop users to synchronize their history, bookmarks, tabs and passwords, according to Mozilla.

Twitter co-founder Jack Dorsey, who returned this week to the company after a two-year absence, said he wants to make the microblogging site more approachable to the masses, acknowledging that the service is “something that people can’t immediately get their head around”.

AT&T’s $39 billion bid to buy T-Mobile USA came under scrutiny from New York’s attorney general, who said he is looking into its possible anti-competitive impact.