# Firefox

> Free, open-source browser from Mozilla with tracker blocking built in

Firefox is a free, open-source web browser made by Mozilla Corporation, a subsidiary of the not-for-profit Mozilla Foundation. It runs on Mozilla's own Gecko engine rather than Chromium, blocks known trackers by default and isolates each site's cookies. A free Mozilla account syncs bookmarks, history, passwords and tabs across Windows, macOS, Linux, Android and iOS, and AI features are optional.

- **Category:** Browsers
- **Made by:** Mozilla Corporation
- **Website:** https://www.firefox.com/en-US/
- **Runs on:** Windows, macOS, Linux, Android, iOS
- **Facts last checked:** Oct 5, 2026

## Pricing

Firefox is free to use.

- **Pricing model:** Free
- **Free plan:** The browser is free with no paid tier. The built-in VPN is free for up to 50 GB of browser traffic per month, and sync uses a free Mozilla account.
- **Free trial:** None listed.

| Plan | Price | What you get |
| --- | --- | --- |
| Free | $0 | The full browser on Windows, macOS, Linux, Android and iOS, including tracker blocking, sync and, on desktop, the built-in VPN up to 50 GB a month. |

Read from https://www.firefox.com/en-US/more/faq/ on Oct 5, 2026. Prices change, so confirm with Firefox before buying.

## Key features

- **Tracking and cookie protection:** Enhanced Tracking Protection blocks known trackers by default, and Total Cookie Protection keeps each site's cookies separate. The shield icon in the address bar shows what was blocked.
- **Built-in VPN:** A VPN toggle in the desktop toolbar routes browser traffic through a proxy server to hide the IP address, free for up to 50 GB per month. It covers the browser only, not other apps on the device.
- **Tab groups, vertical tabs and sidebar:** Tabs can be grouped and color coded or stacked vertically, and a customizable sidebar gives one-click access to bookmarks, history, synced tabs and other tools.
- **AI chatbots in the sidebar:** The sidebar can host a third-party assistant such as ChatGPT, Gemini, Copilot, Claude or Mistral Chat. AI features are optional and can be turned off entirely.
- **Sync with a Mozilla account:** Bookmarks, history, saved passwords and open tabs sync across desktop and mobile with end-to-end encryption, and Send Tab pushes a page from one device to another.
- **Reader mode, PDF editor and translation:** Reader mode strips clutter from articles, a built-in editor fills, signs and annotates PDFs, and pages are translated in the browser without sharing the data with anyone else.

## Good for

- People who want tracker blocking switched on by default
- Users who prefer an open-source browser that is not based on Chromium
- Those who want to pick their own AI chatbot, or turn AI off
- Anyone moving between Windows, macOS, Linux and a phone

## Worth knowing

- The built-in VPN is capped at 50 GB per month and protects browser traffic only. Mozilla's paid VPN service costs $59.88 per year or $9.99 per month, plus tax.
- Firefox shows optional ads on its homepage to fund development. They can be turned off.
- The built-in VPN has not reached Firefox for Android or iOS; Mozilla's roadmap lists VPN on mobile as upcoming work.
- Windows 8.1 and below and macOS 10.14 and below are no longer supported by the standard release; they need Firefox ESR.

## What people say

- **App Store rating of the iPhone and iPad app:** 4.6 out of 5 from 217,973 ratings in the United States, read Oct 5, 2026. This is the store's rating of the app, not a score from ToolGPA. Source: https://apps.apple.com/us/app/id989804926

## Works with

ChatGPT, Gemini, Microsoft Copilot, Claude, Mistral

**Tags:** Web browser, Open source, Password manager, AI features, End-to-end encrypted

## Alternatives

- [Google Chrome](https://toolgpa.com/tools/google-chrome): Google's free browser for desktop and mobile, with Gemini built in. [Compare](https://toolgpa.com/compare/firefox-vs-google-chrome)
- [Brave](https://toolgpa.com/tools/brave): Open-source browser that blocks ads and trackers by default. [Compare](https://toolgpa.com/compare/brave-vs-firefox)
- [Zen Browser](https://toolgpa.com/tools/zen-browser): Free, open-source desktop browser built around vertical tabs. [Compare](https://toolgpa.com/compare/firefox-vs-zen-browser)
- [Vivaldi](https://toolgpa.com/tools/vivaldi): Customizable browser with built-in mail, calendar and feed reader. [Compare](https://toolgpa.com/compare/firefox-vs-vivaldi)
- [Microsoft Edge](https://toolgpa.com/tools/microsoft-edge): Microsoft's browser with the Copilot assistant built in. [Compare](https://toolgpa.com/compare/firefox-vs-microsoft-edge)

## Sources

The prices, plans, platforms and features above were read from these pages on Oct 5, 2026:

- https://www.firefox.com/en-US/
- https://www.firefox.com/en-US/more/faq/
- https://www.firefox.com/en-US/features/all/
- https://www.firefox.com/en-US/features/protection/
- https://www.firefox.com/en-US/features/control/
- https://www.firefox.com/en-US/features/focus/
- https://www.firefox.com/en-US/features/browser-with-built-in-vpn-secure-browsing/
- https://www.firefox.com/en-US/features/ai-powered-chatbot/
- https://www.firefox.com/en-US/features/sync/
- https://www.firefox.com/en-US/user-privacy/
- https://www.firefox.com/en-US/browsers/enterprise/
- https://www.firefox.com/en-US/mobile/
- https://www.firefox.com/en-US/whatsnext/
- https://www.firefox.com/en-US/download/all/

Page: https://toolgpa.com/tools/firefox
Listed by ToolGPA (toolgpa.com).