Download WatchThis!

Name: WatchThis!
Author: Lukas Weihrauch

By: Lukas Weihrauch

Download WatchThis! (current and past versions) for Firefox

Latest Version: 1.0.9 Updated: 4 days ago

Ready to install?

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

View source code

Daily users

5.0

2 ratings

Total downloads

Available versions

You can find the current and older versions of WatchThis! 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
1.0.9	XPI · ZIP · Source code	126.80KB	2026-06-11
1.0.8	XPI · ZIP · Source code	126.43KB	2026-03-09
1.0.7	XPI · ZIP · Source code	123.25KB	2026-02-24
1.0.6	Paid users only	121.97KB	2026-02-20
1.0.4	Paid users only	121.27KB	2026-02-18
1.0.3	Paid users only	120.75KB	2026-02-13
1.0.2	Paid users only	121.83KB	2026-02-09

2026-06-11 · 0 downloads

XPI ZIP Source code

2026-03-09 · 0 downloads

XPI ZIP Source code

2026-02-24 · 0 downloads

XPI ZIP Source code

2026-02-20 · 0 downloads

Paid users only

2026-02-18 · 0 downloads

Paid users only

2026-02-13 · 0 downloads

Paid users only

2026-02-09 · 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 WatchThis! ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the WatchThis! ZIP file from step 1. WatchThis! is now installed on your browser.