Tool profile
Mozilla Firefox: cost, fit and limits
Mozilla Firefox is a web browser made by Mozilla Corporation that blocks fingerprinting and ad trackers and lets users open third-party AI chatbots of their choice from a sidebar or shortcut, instead of shipping a single built-in assistant.
What to know first
Firefox downloads free, and the pages we read name no paid browser tier. Its AI approach is choice: you pick a chatbot and open it in the sidebar or through a shortcut for summaries, writing and brainstorming, and Mozilla says it has no access to the conversations. Each chatbot keeps its own terms, and Mozilla does collect technical and interaction data about how the feature is used.
Mozilla Firefox at a glance
| Maker | Mozilla Corporation, United States |
|---|---|
| Free plan | Yes |
| Entry price | Free download |
| API access | No |
| Category | Best AI Web Browsers in 2026, rank 3 of 11 |
| Website | firefox.com |
Who Mozilla Firefox is best for
Users who want chatbot choice
A sidebar and shortcut open the chatbot you prefer, so switching providers does not require switching browsers or rebuilding your profile.
People who distrust bundled assistants
Mozilla says it cannot read the chatbot conversations, which separates the browser vendor from the model provider in a way built-in assistants do not.
Anyone on an older but supported system
Firefox ESR is offered for Windows 8.1 and older and macOS 10.14 and older, where the regular build is no longer supported.
Mozilla Firefox plans and pricing
| Plan | Price | What it includes |
|---|---|---|
| Firefox | Free download | Browser with fingerprint and ad tracker blocking, Private Browsing Mode and a free password manager. |
Checked November 2026.
What Mozilla Firefox does
- Choose your AI tools
- Several third-party chatbots can be reached from one sidebar without tying you to a single provider, per the Firefox features page, so switching later costs nothing.
- Chatbot shortcut
- A shortcut opens your chosen chatbot for summaries, writing and brainstorming, and Mozilla says it has no access to what you type there or what returns.
- Fingerprint and tracker blocking
- The homepage names fingerprint blocking and ad tracker blocking as protections that limit how sites follow you around, and they are on without extra setup or extensions.
- Private Browsing Mode
- The homepage names a private mode that does not keep a local history of the session you run in it, which suits shared computers and one-off lookups.
- Free password manager
- The features page names a password manager at no extra charge, which removes one reason to install a separate paid tool next to the browser.
How Mozilla Firefox handles your data
Mozilla's Firefox privacy notice says it does not retain personal data for more than 25 months in general. For the chatbot feature, Mozilla says it has no access to the conversations, yet it collects technical and interaction data such as how often each provider is chosen. Each chatbot's own terms and privacy notice govern what you send it. The pages read did not state a hosting region, a model-training position or any certifications, so the vendor's policy was not checked for those points.
Where Mozilla Firefox falls short in practice
- No page-aware agent. Firefox opens a chatbot but the pages we read describe no agent that acts on tabs, so multi-step tasks stay manual for the user to complete.
- Usage data collection. Mozilla collects data on how the chatbot feature is used, such as provider choice counts, which privacy-focused buyers may not expect from the vendor. That is a vendor choice, not a user setting.
- Legacy OS support. Windows 8.1 and older and macOS 10.14 and older are not supported on the regular build, so those machines must use Firefox ESR instead of the current release.
Alternatives to Mozilla Firefox
Mozilla Firefox: common questions
Does Firefox have its own AI assistant?
Not according to the pages read. Firefox lets you open third-party chatbots of your choice in a sidebar or through a shortcut. Mozilla says it has no access to those conversations, and each provider's own terms apply to what you type, so check them before pasting anything sensitive.
What does Mozilla collect about the AI chatbot feature?
Mozilla says it collects technical and interaction data on chatbot use, such as how often each provider is chosen. It also says it cannot read the conversations. The general privacy notice states personal data is not retained for more than 25 months, though the notice does not break that out by feature.
Is Firefox free?
Yes. The download is free and the pages we read name no paid browser tier. The features page names a free password manager. Any chatbot you open may have its own subscription, but that billing is between you and the provider, not Mozilla.
Which operating systems does Firefox still support?
The pages read say Windows 8.1 and older and macOS 10.14 and older are no longer supported on the regular build, and Firefox ESR is offered instead. Newer systems use the regular build. Check the download page for your exact version, since support lists change over time.
Can Firefox summarize a webpage?
Firefox can open a chatbot of your choice for summaries, writing and brainstorming, per the features page. The pages read do not describe a built-in summarizer that reads the page automatically. You would send the content to the chatbot yourself, then follow that provider's data terms.