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#include "head.wmi" TITLE="Torbutton Options"
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<h2>Torbutton Options</h2>
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<p>Torbutton 1.2.0 adds several new security features to protect your
anonymity from all the major threats we know about. The defaults should be
fine (and safest!) for most people, but in case you are the tweaker type,
or if you prefer to try to outsource some options to more flexible extensions,
here is the complete list. (In an ideal world, these descriptions should all be
tooltips in the extension itself, but Firefox bugs <a
href="https://bugzilla.mozilla.org/show_bug.cgi?id=45375">45375</a> and <a
href="https://bugzilla.mozilla.org/show_bug.cgi?id=218223">218223</a> currently
prevent this.)</p>
<ul>
<li>Disable plugins on Tor Usage (crucial)<p>
This option is key to Tor security. Plugins perform their own networking
independent of the browser, and many plugins only partially obey even their own
proxy settings.
</p></li>
<li>Isolate Dynamic Content to Tor State (crucial)<p>
Another crucial option, this setting causes the plugin to disable Javascript
on tabs that are loaded during a Tor state different than the current one,
to prevent delayed fetches of injected URLs that contain unique identifiers,
and to prevent meta-refresh tags from revealing your IP when you turn off
Tor. It also prevents all fetches from tabs loaded with an opposite Tor
state. This serves to block non-Javascript dynamic content such as CSS
popups from revealing your IP address if you disable Tor.
</p></li>
<li>Hook Dangerous Javascript (crucial)<p>
This setting enables the Javascript hooking code. Javascript is injected into
pages to hook the Date object to mask your timezone, and to hook the navigator
object to mask OS and user agent properties not handled by the standard
Firefox user agent override settings.
</p></li>
<li>Resize window dimensions to multiples of 50px on toggle (recommended)<p>
To cut down on the amount of state available to fingerprint users uniquely,
this pref causes windows to be resized to a multiple of 50 pixels on each