Firefox desktop extension

Make your writing sound human.

Hemmingway adds a compact button to supported writing fields across the web. Select a passage and right-click for another way to start. A small panel opens where you tell Hemmingway what to do with your text.

Version 1.1.9 · Firefox 142 or later on desktop · Signed by Mozilla

Get started

1. Open this page in Firefox on your computer. Choose Add to Firefox, then review and accept Firefox’s installation and data permissions.
2. Sign in to your Hemmingway AI account in the extension settings. Existing Hemmingway account allowances and subscriptions apply. Free usage is limited.
3. Enable the automatic h button in settings and allow access to the sites where you want to use it. You can also select text and right-click Rewrite with Hemmingway.
4. Write your instruction or choose a preset. Preview the result, then choose Replace or Copy. Undo restores your previous draft, provided you haven’t edited it since the replacement.

Polish, shorten, or change the tone

Four presets cover common writing tasks: Polish, Shorten, Make warmer, and Make more professional. Or write your own instruction in plain language. Ask for a warmer email, a shorter post, or a clearer explanation.

Dictate your words

Prefer to speak? Choose Dictate, start recording, and say what you want to write. Stop recording, review and edit the transcript, then use the text in your draft.

Use your Hemmingway AI account

Existing Hemmingway account allowances and subscriptions apply. Free usage is limited. You can also connect your own API credentials to use API billing.

Compatibility

Compatibility varies by website and editor. Some sites and browser-protected pages restrict extensions. Where direct replacement is unavailable, use Copy to transfer your result.

Firefox can update this extension automatically from hemmingway.io. For installation help, contact us.