The changelog for this is fairly small, but we did enable accessibility support (screen readers, etc for vision impared) for Windows. Testing of these features on Windows is especially useful for this reason: https://people.torproject.org/~mikeperry/builds/3.5.1/
Changelog: * All Platforms * Bug 10447: Remove SocksListenAddress to allow multiple socks ports. * Bug 10464: Remove addons.mozilla.org from NoScript whitelist * Update Torbutton to 1.6.5.3 * Bug 9486: Clear NoScript Temporary Permissions on New Identity * Update Tor to 0.2.4.20 * Windows * Bug 9259: Enable Accessibility support in Firefox build