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[GNU IceCat](https://www.gnu.org/software/gnuzilla/) is the GNU version of the Firefox ESR browser.
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Extensions included to this version of IceCat:
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* LibreJS
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GNU LibreJS aims to address the JavaScript problem described in the article
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"[The JavaScript Trap](https://www.gnu.org/philosophy/javascript-trap.html)" of Richard Stallman.
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* HTTPS Everywhere
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HTTPS Everywhere is an extension that encrypts your communications with
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many major websites, making your browsing more secure.
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* A set of companion extensions for LibreJS by Nathan Nichols
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are pre-installed, and provide workarounds to use some services at USPS,
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RSF.org, SumOfUs.org, pay.gov, McDonalds, goteo.org and Google Docs
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without using nonfree JavaScript.
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* A series of configuration changes and tweaks were applied to ensure that
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IceCat does not initiate network connections that the user has not explicitly
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requested. This implies not downloading feeds, updates, blacklists or any
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other similar data needed during startup.
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Origin of the name
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The name “IceCat” was coined to show our relationship to the Mozilla Firefox browser. Ice isn't Fire and a Cat isn't a Fox, so it is clearly a different package (we don't want Mozilla blamed for our mistakes, nor cause confusion with their trademarks), but is equally clearly intimately related (of course nearly all of the work comes from the Mozilla foundation effort, so we want to give credit).
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The gNewSense BurningDog browser and the Debian IceWeasel browser are similarly derived from Firefox, also with the intent of being free software. Technically, however, these projects are maintained entirely independently of IceCat. (Previously, this GNU browser project was also named IceWeasel, but that proved confusing.)
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About GNU and the GNU Philosophy
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The [GNU Project](https://www.gnu.org/) was launched in 1984 to develop a complete Unix-like operating system which is [free software—free as in freedom, not price](https://www.gnu.org/philosophy/free-sw.html). Its principal sponsor is the [Free Software Foundation](https://www.fsf.org/).
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The [free software philosophy](https://www.gnu.org/philosophy/philosophy.html) is the root and motivation of the guidelines and goals of the whole free software movement, a worldwide community.
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