Complex sentence: The 3DS Internet Browser was first introduced in system update 2.0.0-2 (June 2011) and has been progressively updated up to the latest system update (5.0.0-11), which allowed for proxy editing and has a slight redesign on the web browser.
Split into simpler sentences: The 3DS Internet Browser was first introduced in system update 2.0.0-2 (June 2011) and has been progressively updated up to the latest system update. Update 5.0.0-11 (March 2013) allowed for proxy editing and has a slight redesign on the web browser.