Stable AMO Version, see changelog for details.

Cross-browser NoScript on the chrome web store

Supported browsers: Firefox (Desktop and Mobile on Android), SeaMonkey, Tor Browser (where it is built-in), Chromium/Chrome.
Other browsers based on Gecko versions >= 45 might work, but are not tested.

Direct download

You can get latest stable version here, too, using this direct download link for NoScript 11.1.3
To install, just drag and drop it onto your address bar.

v 11.1.3
============================================================
x Fixed regression: document media and font restrictions
  always cascaded (thanks BrainDedd for report)
x Remove domPolicy logging when debugging is off
x Trivial reordering from Mozilla source
x Updated TLDs

v 11.1.1
============================================================
x Updated TLDs
x Better heuristic to figure out missing data while
  computing contextual policies
x Fixed regression breaking per-tab restrictions disablement
  (thanks Horsefly for report)

v 11.1.0
============================================================
x Improved blocking of media documents unaffected by
  webRequest
x Automatically init tag message with last changelog
x Improved NOSCRIPT element emulation compatibility with XML
  documents
x webNavigation.onCommitted + tabs.executeScript to deliver
  DOM policies earlier whenever possible
x Partial work-around for Fx 80 file:// documents parsing
  inconsistencies (further fix for issue #156)
x Cache policy on top document for file:// subdocuments
  (fixes issue #156)
x Enforce more restrictive CSP on media/object documents
x Better cross-browser media handling
x [Mobile] Use tabs as prompts if the browser.windows API is
  missing
x Fix browser UI for image, audio and video content being
  partially broken on file:// URLs
x Normalize file:// directory paths on Firefox
x Allow browser UI scripts for file:// directory navigation
x Updated TLDs
x [L10n] Updated mk

You can still download NoScript "Classic" (5.1.9) (SHA256) for Palemoon, Seamonkey, Waterfox 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 44 and below are urged to upgrade their very unsafe browser. For those few who can't,

• 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 11.1.2rc1 development build

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

Recent development history:

v 11.1.2rc1
============================================================
x Fixed regression: document media and font restrictions
  always cascaded (thanks BrainDedd for report)
x Remove domPolicy logging when debugging is off
x Trivial reordering from Mozilla source
x Updated TLDs

v 11.1.1rc1
============================================================
x Updated TLDs
x Better heuristic to figure out missing data while
  computing contextual policies
x Fixed regression breaking per-tab restrictions disablement
  (thanks Horsefly for report)

v 11.1.0rc2
============================================================
x Improved blocking of media documents unaffected by
  webRequest
x Automatically init tag message with last changelog

v 11.1.0rc1
============================================================
x Improved NOSCRIPT element emulation compatibility with XML
  documents

v 11.0.47rc6
============================================================
x webNavigation.onCommitted + tabs.executeScript to deliver
  DOM policies earlier whenever possible
x Fixed typo causing CSP-based media blocking to skip
  requests with no content-type header

v 11.0.47rc5
============================================================
x Partial work-around for Fx 80 file:// documents parsing
  inconsistencies (further fix for issue #156)

v 11.0.47rc4
============================================================
x Cache policy on top document for file:// subdocuments
  (fixes issue #156)
x Updated TLDs
x Enforce more restrictive CSP on media/object documents

v 11.0.47rc3
============================================================
x Better cross-browser media handling
x Improved file: directory path normalization

v 11.0.47rc2
============================================================
x [Mobile] Use tabs as prompts if the browser.windows API is
  missing

v 11.0.47rc1
============================================================
x Fix browser UI for image, audio and video content being
  partially broken on file:// URLs
x Normalize file:// directory paths on Firefox
x Allow browser UI scripts for file:// directory navigation
x Updated TLDs
x [L10n] Updated mk

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!