I built 10 free Firefox extensions for everyday users — here's what I learned

I've spent the last year building Firefox extensions for everyday users — not developers. Students, remote workers, home office users. People who don't know what "manifest v3" means and don't care. They just want something that works.

Here's the full story, and all 10 extensions.

Why everyday users?

Most browser extension articles are written by developers, for developers. But Firefox has millions of users who just want their browser to do more.

I decided to build for them.

The extensions

Here's everything I've shipped, with direct AMO links:

Tab management

Tab Manager & Session Saver

Saves your open tabs as named sessions. Close Firefox, come back tomorrow, restore exactly where you left off. Tab hoarders: this is for you.

Dark mode

NightOwl

Applies dark mode to every website, including ones that ignore your system dark mode setting. Biggest complaint from users: "why doesn't [site X] go dark?" NightOwl fixes that.

Voice & audio

Voice Notes & Audio Recorder

Record voice memos right in your browser. No app switching. Works mid-research when you have an idea and need to capture it fast.

Daily planning

Daily Planner & To-Do List

Replaces your new tab with your daily task list. Start every browser session with your goals.

Writing

AI Writing Assistant

Helps you write better emails, social posts, and documents right in your browser.

Dashboards (new tab)

Weather & Clock Dashboard

Live weather in every new tab.

News & Widget Dashboard

Your daily headlines in every new tab.

Stock Market & Finance Dashboard

Live stock prices and portfolio tracking in your new tab.

Utilities

Quick Calculator & Unit Converter

Fast math and conversions without switching apps.

Speed Dial & Tools Hub

A customizable new tab with quick links to everything you use.

What I learned

1. Everyday users want simplicity above all

Every time I added a "feature" that required any setup, installs dropped. The extensions that work best are ones that are useful the moment you install them.

2. AMO discoverability is real but slow

Mozilla's search is based on ADU — active daily users. More installs → better ranking → more installs. Getting the first 100 users is the hard part.

3. Dark mode and tab management are the two biggest pain points

If you're building Firefox extensions and want organic traffic, these are the categories with the most search intent.

4. Consumer ≠ developer

Every time I wrote copy aimed at developers ("open source," "privacy-first," "no telemetry"), I lost the everyday user. Write for the person who doesn't know what those words mean.

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All 10 extensions are free. No subscriptions. No accounts. Just install and go.

The suite is on Mozilla AMO: https://addons.mozilla.org/

Questions? Drop them in the comments.