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Stable AMO Version, see changelog for details.

Supported browsers: Firefox (Desktop and Mobile on Android), SeaMonkey, Tor Browser (where it is built-in).
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 10.1.9.9
To install, just drag and drop it onto your address bar.

v 10.1.9.9
=============================================================
x Prevention of potential race condition in the new  per-tab
  configuration cookie-based hack
x Better cross-platfrom build script compatibility
x Per-tab configuration cookie-based hack, leaves window.name
  alone
x Various build scripts fixes

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

You can still download NoScript "Classic" (5.1.9) 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,

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 10.1.9.9rc2 development build

Here, if you need it, the "Classic" NoScript 5.1.9rc1 development build for browsers based on Gecko 56 and below. Please notice you may need to open about:config and set your xpinstall.signatures.required preference to false in order to install, since Mozilla doesn't support signatures for legacy add-ons anymore.

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

Recent development history:

v 10.1.9.9rc2
=============================================================
x Prevention of potential race condition in the new  per-tab
  configuration cookie-based hack
x Better cross-platfrom build script compatibility

v 10.1.9.9rc1
=============================================================
x Per-tab configuration cookie-based hack, leaves window.name
  alone
x Various build scripts fixes

v 5.1.9rc1
=============================================================
x Fixed automatic reload bug (thanks ThomasW and barbaz for
  reporting)

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!

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