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These sites offer free and paid courses in everything from programming and web design to music theory and graphics

Firefox browser will offer to block web tracking

Mozilla, the non-profit group that created the Firefox web browser, has said it plans to allow its 450 million users to block the internet tracking that allows third parties to monitor their movements online. When the plans were first mooted in February, one advertising executive reportedly described them as “a nuclear first strike” against the advertising industry. Tracking allows firms to follow a user's tastes and target them with appropriate online ads.

Novel by Adam Johnson set inside North Korea wins Pulitzer prize

As the world waits to see what the North Korean dictatorship does next, the judges of the Pulitzer prizes yesterday honoured a novel acclaimed for its depiction of the secretive state, naming Adam Johnson’s “The Orphan Master’s Son” as the winner of the fiction award after withholding the prize last year.

Aaron Swartz: Campaigner for internet freedom

Aaron Swartz was a campaigner for internet freedom and a software developer who made an enormous impact during his 26 short years on the planet. His campaigning work and direct action for freedom of information had led him into frequent conflict with the authorities, with the result that, at the time of his death, he faced 13 felony charges for which he was due to stand trial within the coming months.

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Steve Hilton's next Big Idea: Swap Downing Street for time out in

He is credited as the architect of the Big Society and once suggested the abolition of paid maternity leave. Now Steve Hilton, David Cameron's most influential adviser, has pulled off one last surprise: unexpectedly announcing his departure from Downing Street for an unpaid academic job in California.

Mobile marine reserves may end slaughter of endangered sea life

The indiscriminate slaughter of vast numbers of turtles, sharks, albatrosses and other endangered marine animals that get unintentionally caught by fishermen as “by-catch” could be prevented by a radical proposal of mobile marine reserves, scientists said yesterday.