NoScript is Free Software: if you like it, you can support its progress :)

Stable AMO Version, see changelog for details.

Supported browsers: Firefox 3.0 and above, SeaMonkey 2.0 and above, IceWeasel, Minefield
Other browsers based on Gecko 1.9.0 and above might work, but are not tested.

Mobile Version

If you want to test NoScript 3 alpha for Firefox 4 Mobile, compatible with Android and Maemo, you can find it at the NoScript Anywhere for Mobile mini-site.

Direct download

You can get latest stable version here, too, using this direct download link for NoScript 2.6.9.31
To install, just drag and drop it onto your address bar.

If you find any problem installing it, this FAQ may help.

Users of Firefox 2.0 and below are urged to upgrade their very unsafe browser. For those few who can't, latest legacy-compatible NoScript version is 1.10.Recommended: protect your Internet traffic, too, with Military Grade Encryption.

Development version

If you're brave enough and you need a specific feature or fix not released yet, or you simply want to provide feedback before official release, you may want try this
development build.
Recent development history:

v 2.6.9.32rc2
=============================================================
x [XSS] Fixed regression in minimal inline JavaScript
  fragment detection (thanks Gareth Heyes for reporting)

v 2.6.9.32rc1
=============================================================
x Fixed edge case causing JavaScript redirections detection
  to fail on http://qklnk.co/ (thanks Jess Hampshire for RFE)

Feedback

If you find something wrong about NoScript, read the FAQ page and/or let me know: I'll try to fix it as soon as I can.

You can also discuss about NoScript on this Forum.

Have your safest browsing experience!