Download Riddler

Name: Riddler
Author: Emoon

By: Emoon

Download Riddler (current and past versions) for Firefox

Latest Version: 0.6.6 Updated: a year ago

Ready to install?

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

View source code

Daily users

5.0

4 ratings

Total downloads

Available versions

You can find the current and older versions of Riddler 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
0.6.6	XPI · ZIP · Source code	1.27MB	2025-08-03
0.6.5.3	XPI · ZIP · Source code	1.27MB	2025-07-19
0.5.3.7	XPI · ZIP · Source code	1.27MB	2025-03-25
0.3.9	Paid users only	1.02MB	2022-06-25

2025-08-03 · 0 downloads

XPI ZIP Source code

2025-07-19 · 0 downloads

XPI ZIP Source code

2025-03-25 · 0 downloads

XPI ZIP Source code

2022-06-25 · 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 Riddler ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the Riddler ZIP file from step 1. Riddler is now installed on your browser.