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 11.2.11
To install, just drag and drop it onto your address bar.

v 11.2.11
============================================================
x [nscl] Fixed JavaScript access to CSS rules broken on
  Chromium when unrestricted CSS is disabled - issue #204
x Prevent Chromium builds from being sent to AMO for signing
x [nscl] Fixed CPU/RAM overload on some pages with
  unrestricted CSS disabled but scripting enabled (not
  recommended setting) - issue #194, issue #199
x [nscl] Fixed CPU spikes on Chromium triggered by automatic
  file downloads (thanks ptheborg for report)

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 11.2.12rc1 development build

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

Recent development history:

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

v 11.2.11rc4
============================================================
x [nscl] Fixed JavaScript access to CSS rules broken on
  Chromium when unrestricted CSS is disabled - issue #204

v 11.2.11rc3
============================================================
x Prevent Chromium builds from being sent to AMO for signing
x [nscl] More granular fix for CSS prefetch-related CPU
  spikes with scripts enabled

v 11.2.11rc2
============================================================
x [nscl] Fixed CPU/RAM overload on some pages with
  unrestricted CSS disabled but scripting enabled (not
  recommended setting) - issue #194, issue #199

v 11.2.11rc1
============================================================
x [nscl] Fixed CPU spikes on Chromium triggered by automatic
  file downloads (thanks ptheborg for report)
x [L10n] Updated tr

v 11.2.10rc1
============================================================
x Cross-browser file naming consistency, in spite of version
  numbering incompatibilities
x [nscl] Fix for potential race conditions on certain page
  transitions (issue #205)
x Handle exception when accessing navigator.serviceWorker on
  sandboxed frames
x MS Edge support

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!