NSC Blocker

The NSC response header defines how websites can communicate that their content isn't safe, for example when it contains adult content. The header is defined in an experimental specification and implemented on the client side with this add-on.

NSC Blocker is available to install from Firefox Browser Add-ons and for download from this page. The latest version is 1.2, and it was last updated 3 years ago.

View source code

Install from Firefox Browser Add-ons

Total download count: 0 (Only count downloads from Firefox-Stats)

All available versions

You can find the current and older versions of NSC Blocker here. You can download the archived versions or inspect their source codes.

As a free user, you can only download the latest version.

Upgrade to download older versions

Version	Download	Size	Download count	Timestamp
1.2	XPI · ZIP · Source code	102.27K	0	2022-03-29

Install XPI file

An XPI file, short for "XPInstall," is a compressed file format used primarily by Mozilla applications, like Firefox and Thunderbird, to distribute and install add-ons or extensions. These files are similar in function to CRX files for Chrome but cater to the Mozilla ecosystem.

Simply drag-and-drop the XPI into Firefox to install the add-on.

Install ZIP file

Download the NSC Blocker ZIP file
In Firefox browser, go to about:addons to open Add-ons Manager
Click on , then select Install Add-on From File
Select the NSC Blocker ZIP file from step 1. NSC Blocker is now installed on your browser.