To use these add-ons, you'll need to download Firefox.

Firefox Browser Add-ons

Extensions
Themes
- for Firefox
- Dictionaries & Language Packs

Search

Add-ons developer

TesterTesting

User since: Oct 19, 2026
Number of add-ons: 1

Report this user

Extensions by TesterTesting

There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet

Themes by TesterTesting

There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet
There are no ratings yet

Go to Mozilla's homepage

Add-ons

About
Firefox Add-ons Blog
Extension Workshop
Developer Hub
Developer Policies
Community Blog
Forum
Report a bug
Review Guide

Download

Download Firefox
Windows
macOS
iOS
Android
Linux
All

Latest Builds

Nightly
Beta

Firefox for Business

Enterprise

Community

Connect
Contribute
Developer

Follow

Instagram
YouTube
TikTok
Bluesky
Podcast

Privacy
Cookies
Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.

Change language

Change theme