Stable AMO Version, see changelog for details.

Cross-browser NoScript on the chrome web store

Supported browsers: Firefox (Desktop and Mobile on Android), Tor Browser (where it is built-in), Chromium/Chrome.
Other browsers based on Gecko versions >= 59 and on latest Chromium might work, but are not tested.

Direct download

You can get latest stable version here, too, using this direct download link for NoScript 11.2.15
To install, just drag and drop it onto your address bar.

v 11.2.15
============================================================
x [Android] Work-around for Firefox "forgetting" tabs
x [nscl] Improved cross-frame auto-patching

You can still download NoScript "Classic" (5.1.9) (SHA256) for Seamonkey, Palemoon, Waterfox Classic and possibly other "vintage" (pre-Gecko 57) Firefox forks here: we'll do our best to provide security fixes as long as supporting browser still guarantee their own security updates.

Notice: you may need to open about:config and set your xpinstall.signatures.required preference to false in order to install NoScript 5.x, since Mozilla doesn't support signatures for legacy add-ons anymore. If you're using a non ESR Firefox, you may also need this hack.

v 5.1.9
=============================================================
x Fixed automatic reload bug (thanks ThomasW and barbaz for
  reporting)

Users of Firefox 58 and below are urged to upgrade their very unsafe browser. For those few who can't,

• latest NoScript version compatible with Gecko 57 - Gecko 58 is 10.1.7.3;
• latest NoScript version compatible with Gecko 46 - Gecko 56 is 5.1.9 (SHA256);
• latest NoScript version compatible with Gecko 13 - Gecko 45 is 2.9.0.14 (SHA256);
• latest NoScript version compatible with Gecko 1.9 - Gecko 12 is 2.9.0.1rc1 (SHA256);
• latest NoScript version compatible with Gecko < 1.9 is 1.10 (SHA256).

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
"Quantum" NoScript 11.2.16rc1 development build

Starting with NoScript 10.1.8.3, NoScript's public source code repository is hosted on Github.

Recent development history:

v 11.2.16rc1
============================================================
x [L10n] Updated fr
x Better support for service workers in unrestricted modes
  (thanks Mark McVeigh for reporting)

v 11.2.15rc1
============================================================
x [Android] Work-around for Firefox "forgetting" tabs
x [nscl] Improved cross-frame auto-patching

v 11.2.14rc1
============================================================
x [nscl] Updated SyncMessage fixes conflict with other
  content blockers (thanks gwarser, barbaz and Baraoic)

v 11.2.13rc1
============================================================
x [XSS] Restored compatibility with Gecko 77 and below

v 11.2.12rc6
============================================================
x [XSS] Fixed regression causing "too much recursion" false
  positives (thanks barbaz for report)
x [XSS] Precomputed invalid identifier chars regular
  expression

v 11.2.12rc5
============================================================
x [XSS] Tweaked risky operator check prevents false positive
  on outbound Twitter navigation (thanks @muchtypo for
  reporting)
x [XSS] Better logging for JS fragment detection
x [XSS] Fixed performance regression in invalid character
  ranges generation causing random XSS "DOS" false positives
x Fetch policy for baseURI if document.domain is empty

v 11.2.12rc4
============================================================
x [L10n] Updated ja, lt, pl, ru, zh_CN
x Always fetch policy synchronously, if missing
x Fixed undetermined status icon on BF cache page loads

v 11.2.12rc3
============================================================
x [nscl] Fix webgl blocking regression due to xray wrappers
  confusion (thanks skriptimaahinen)

v 11.2.12rc2
============================================================
x [nscl] Prevent unnecessary breakages on pages inspecting
  canvas.getContext when webgl is disabled

v 11.2.12rc1
============================================================
x [nscl] Reduce the risk to interfere with scripts messing
  with the media attribute (issue #207)

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!