Typlx is Now on Firefox: Private Grammar Checking for Every Browser
June 24, 2026
Since we launched Typlx as a Chrome extension, the most frequent request we have received is simple: “When is the Firefox version coming?” Today, the answer is: right now.
Typlx for Firefox is live on the Firefox Add-ons store. Same privacy-first grammar checking, same LLM-powered intelligence, same open-source codebase — now available to every Firefox user.
Why Firefox?
Firefox and Typlx share the same values. Firefox has long been the browser of choice for people who care about privacy, open standards, and user agency. Its community has consistently pushed back against surveillance-based business models and walled gardens.
That is exactly the audience Typlx was built for. We believe your text is your business. We believe grammar checking should not require sending every keystroke to a corporate server. And we believe the tools you use every day should be open source and auditable.
Launching on Firefox is not just a technical milestone — it is an alignment of values. If you chose Firefox because you care about privacy, Typlx is the grammar checker that respects that choice.
What's in the Firefox Release
The Firefox add-on ships with full feature parity. Everything that works in Chrome works in Firefox:
- Inline grammar suggestions — corrections appear directly in the text field where you are typing, not in a separate panel.
- Spelling correction — catches typos and misspellings with context-aware accuracy.
- Style improvements — suggestions to tighten wordiness, fix awkward phrasing, and improve clarity.
- Local-first inference — connect to Ollama or LocalAI running on your machine for fully private processing.
- Works across the web — Gmail, GitHub, Slack, Notion, LinkedIn, and any other site with text input fields.
- No account required — install and start using immediately. No sign-up, no email, no tracking.
- AI provider options — choose between local models, OpenAI, Anthropic, or any OpenAI-compatible API endpoint.
Privacy: The Same Promise, Now on Firefox
Our privacy architecture is identical across both browsers. Your text never leaves your browser unless you explicitly configure a cloud AI provider. When you use a local model, the entire grammar checking pipeline runs on your device — the extension communicates with your local inference server and nothing else.
When you do choose a cloud provider, the connection goes directly from your browser to the provider's API. Typlx never proxies, stores, or logs your text. There is no Typlx server in the middle. There is no analytics payload. There is no telemetry.
This is not just a policy — it is an architectural guarantee. The code is open source. You can verify it yourself.
Installing Typlx on Firefox
Getting started takes less than a minute:
- Visit the Firefox Add-ons page — search for “Typlx” on addons.mozilla.org or follow the link from our homepage.
- Click “Add to Firefox” — confirm the permissions prompt. Typlx only requests access to text fields on the pages you visit.
- Configure your AI provider — open the extension settings and choose your backend. For maximum privacy, install Ollama and select a local model. For maximum accuracy, connect a cloud API key.
- Start typing — navigate to any website with a text field and write normally. Typlx will surface suggestions inline as you type.
What's Next
Firefox is our second browser, but it will not be our last. Here is what we are working on next:
- Safari extension — bringing Typlx to macOS and iOS Safari users.
- Mobile keyboards — grammar checking on your phone, with the same privacy-first approach.
- Self-hosted backend — a Docker image you can deploy on your own server for teams that want centralized AI inference without a third-party cloud.
Thank You, Firefox Community
We built Typlx because we believe privacy and quality should not be trade-offs. The Firefox community has been asking for this since day one, and we are grateful for the encouragement, the bug reports, and the pull requests that helped us get here.
If you try Typlx on Firefox and have feedback, open an issue on GitHub or reach out on our community channels. We read everything.
Happy writing.