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This is a small but potentially very useful hack add-on. It listens for HTTP requests and responses from Firefox. If any of those come from a page that contains a ThinkAhead block, the block is used to modify HTTP headers accordingly. In short, this allows for relatively hassle-free control of both incoming and outgoing HTTP headers by programmatic means, even when Javascript is disabled on the page in question.

For usage information, please visit the project's home page: thinkahead.mozdev.org.

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