Stallman: the JavaScript trap

Richard Stallman has posted a warning about non-free JavaScript code and a call for a mechanism which would enable browsers to run only freely-licensed JavaScript. "It is possible to release a Javascript program as free software, by distributing the source code under a free software license. But even if the program's source is available, there is no easy way to run your modified version instead of the original. Current free browsers do not offer a facility to run your own modified version instead of the one delivered in the page. The effect is comparable to tivoization, although not quite so hard to overcome."

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