Download Font Swapper

Name: Font Swapper
Author: KeyOuts

By: KeyOuts Add-on

Download Font Swapper (current and past versions) for Firefox

Latest Version: 1.4.0 Updated: 5 days ago

Ready to install?

Font Swapper 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 Font Swapper 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
1.4.0	XPI · ZIP · Source code	35.23KB	2026-07-22
1.2.8	XPI · ZIP · Source code	16.57KB	2026-06-26
1.2.7	XPI · ZIP · Source code	16.10KB	2026-03-05
1.2.6	Paid users only	16.51KB	2026-01-30
1.2.4	Paid users only	15.80KB	2026-01-21
1.2.2	Paid users only	15.32KB	2026-01-20
1.2.1	Paid users only	15.21KB	2026-01-17

2026-07-22 · 0 downloads

XPI ZIP Source code

2026-06-26 · 0 downloads

XPI ZIP Source code

2026-03-05 · 0 downloads

XPI ZIP Source code

2026-01-30 · 0 downloads

Paid users only

2026-01-21 · 0 downloads

Paid users only

2026-01-20 · 0 downloads

Paid users only

2026-01-17 · 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 Font Swapper ZIP file.
In Firefox browser, go to about:addons to open Add-ons Manager
Click on ⚙, Install Add-on From File
Select the Font Swapper ZIP file from step 1. Font Swapper is now installed on your browser.