Download Known Sites

Name: Known Sites
Author: Marcono1234

By: Marcono1234

Download Known Sites (current and past versions) for Firefox

Latest Version: 1.1.0 Updated: 10 days ago

Ready to install?

Known Sites is available to install from Firefox Add-ons Store and for download from this page.

View source code

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Total downloads

Available versions

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

As a free user, you can download up to 3 latest versions.

Upgrade to download older versions

Version	Download	Size	Timestamp
1.1.0	XPI · ZIP · Source code	166.87KB	2026-07-03
1.0.4	XPI · ZIP · Source code	173.98KB	2025-08-08
1.0.3	XPI · ZIP · Source code	107.64KB	2023-03-23
1.0.1	Paid users only	102.92KB	2022-03-24

2026-07-03 · 0 downloads

XPI ZIP Source code

2025-08-08 · 0 downloads

XPI ZIP Source code

2023-03-23 · 0 downloads

XPI ZIP Source code

2022-03-24 · 0 downloads

Paid users only

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 Known Sites ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the Known Sites ZIP file from step 1. Known Sites is now installed on your browser.