If you use Firefox and you want to be more productive without subscribing to another app, these 10 free extensions are worth knowing about. No ads, no subscriptions, no accounts, no data collection. They just work.
1. Tab Manager & Session Saver
If you constantly have too many tabs open — and lose track of what you were researching after a browser restart — this is the one to install first.
What it does: Save your current browser session (all open tabs) as a named snapshot. Restore any saved session with one click. Search all your open tabs. Find and close duplicates.
No sync, no cloud. Sessions stored locally.
👉 Tab Manager & Session Saver — Free
2. NightOwl — Dark Mode for Every Website
Some websites still don't have a dark mode in 2026. NightOwl adds intelligent dark mode to any page, preserving images and videos (no color inversion weirdness).
What it does: One-click dark mode for any site. Schedule it to activate at sunset and deactivate at sunrise. Per-site whitelist for sites you want to keep light.
👉 NightOwl Dark Mode — Free
3. Daily Planner & To-Do List
A to-do list that lives in a new tab. Every time you open a new tab, you see your task list — not a blank page or a generic feed.
What it does: Add, check off, and organize tasks. Daily reset option. No account required.
Best for: People who want a lightweight task list without Notion, Todoist, or another subscription.
👉 Daily Planner & To-Do List — Free
4. Voice Notes & Audio Recorder
For when you need to capture a thought quickly but don't want to stop and type.
What it does: One-click microphone recording from the toolbar. Saves recordings locally (no cloud). Playback in the extension. Export as WAV.
Best for: Remote workers between meetings, students after lectures.
👉 Voice Notes & Audio Recorder — Free
5. Quick Calculator
A calculator that opens from the toolbar. No switching apps or tabs to do basic math.
What it does: Click the icon, do your calculation, copy the result. Standard and scientific modes.
Small and focused — this solves exactly one problem well.
👉 Quick Calculator — Free
6. Weather & Clock Dashboard
Turns your new tab into a live weather dashboard: temperature, humidity, feels-like, wind speed, and a clock.
Uses Open-Meteo's free weather API. No API key required.
👉 Weather & Clock Dashboard — Free
7. Speed Dial Hub
Replaces your new tab with a visual grid of your most-visited or favorite sites. Click once to open any of them.
Better than bookmarks for your "daily driver" sites.
👉 Speed Dial Hub — Free
8. AI Writing Assistant
Right-click any text field on any website. Select text and choose: Rewrite, Summarize, Expand, Fix grammar, or Change tone.
The result replaces your text inline — no copy-pasting, no switching to a separate AI chat.
Best for: Drafting emails, Slack messages, feedback forms.
👉 AI Writing Assistant — Free
9. News Widget Dashboard
Replaces your new tab with a curated news feed from sources you choose. Stay current without social media.
👉 News Widget Dashboard — Free
10. Stock Market & Finance Dashboard
For anyone tracking a portfolio: replaces your new tab with live stock prices, charts, and market data.
👉 Stock Market & Finance Dashboard — Free
The Setup I Recommend
For remote workers: Tab Manager + NightOwl + Daily Planner + AI Writing Assistant
For students: Tab Manager + Daily Planner + Voice Notes + Quick Calculator
For casual users: NightOwl + Weather & Clock + Speed Dial Hub + News Widget
All 10 are free with no accounts or subscriptions. Install whichever fit your workflow.
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