This extension adds ChatGPT as a configurable Firefox search provider. Type gpt <query> in the address bar to open the query in a new ChatGPT session. It uses no API key, custom server, or intermediary handler.

This is an unofficial extension provided by Zavage Software Inc.

See LICENSE.txt for licensing terms.

Ask about selected text

Highlight text on a webpage, right-click it, and choose Ask ChatGPT. ChatGPT opens with your selection. If the prompt is not sent automatically, press Enter in ChatGPT to send it. Try selecting a paragraph you want explained or translated.

You can also press Alt+Shift+G to use the current selection. With nothing selected, the shortcut opens a blank chat. Change the shortcut under Manage Extension Shortcuts in the about:addons gear menu.

The options panel shows your currently configured shortcut and refreshes when it changes or you return to the panel. If you remove it, the panel shows “No keyboard shortcut assigned”. Its Change keyboard shortcut button opens Firefox’s shortcut editor when supported; otherwise follow the menu path above. Restore defaults does not change your keyboard shortcut.

To customize the prompt, set Prompt template to something like Explain simply: {query} or Translate into Spanish: {query}. The Simple menu action, Ask normally, and the shortcut use your template. Other advanced actions use their own dedicated prompts.

Search keyword and default engine

Open Firefox’s Settings → Search, or paste about:preferences#search into the address bar. Under Search Shortcuts, edit ChatGPT’s keyword to replace gpt with your preferred prefix. Under Default Search Engine, choose ChatGPT to search without a prefix, or choose your previous engine to switch back. See Firefox’s search settings guide for illustrated instructions.

These are Firefox settings; the extension’s Restore defaults button does not change them.

Options

Open about:addons, select this extension, and choose the Options tab (Preferences on macOS and Linux). Available settings:

Context menu — Simple (default) keeps the direct selection action; Advanced offers contextual presets; Off hides the menu. The keyboard shortcut works in every mode. Existing enabled/disabled preferences migrate to Simple/Off. Changes apply without restarting Firefox.
Show Translate in advanced menu — off by default. When enabled, choose Ask each time for a language dialog, or enter a Preferred language to translate directly. An empty or invalid preferred language falls back to asking. Enter continues; Escape or Cancel opens nothing.
Request a temporary chat — asks ChatGPT not to save the conversation. ChatGPT may not honour this; check its own indicator before relying on it.
Ask ChatGPT to use web search — a hint to ChatGPT's interface, not a guarantee.
Open in — a new tab, a new background tab, or a new window.
Prompt template — wraps your text, for example Explain simply: {query}.

Restore defaults resets extension preferences to Simple mode with translation hidden; it does not change Firefox's search engine or shortcut settings.

In Advanced mode, selected text offers Ask normally, Explain, Summarize, and Debug code. Translate appears only when enabled. The extension does not try to detect code. A selected link uses selection actions; without a selection, a link offers Ask about this link and Review link safety. Page background offers Ask about this page and Summarize this page. Link/page actions send only the URL. ChatGPT may be unable to access its content, and a link review is not a guarantee of safety.

Long selections require confirmation before sending shortened text. Link URLs are never shortened: unsupported schemes, embedded login credentials, and URLs that cannot fit are rejected. The extension does not simulate submission; ChatGPT controls whether a URL prompt is sent automatically or waits in the composer.

These settings apply to selecting text and choosing Ask ChatGPT from the right-click menu, or pressing Alt+Shift+G. Rebind the shortcut under Manage Extension Shortcuts in the Add-ons gear menu.

The gpt <query> address-bar search is unchanged and does not read these settings.

The options panel, the right-click item, and the keyboard shortcut require Firefox 112 or newer. On older versions the extension still installs and the gpt <query> address-bar search still works; only these newer features are inactive.

Sending your prompt

The extension opens ChatGPT with the prompt in the URL. ChatGPT controls what happens next: it may send the prompt automatically or leave it in the composer. If the prompt is not sent automatically, press Enter in ChatGPT.

The extension does not click Send, simulate Enter, or call ChatGPT's internal conversation API. This behavior can vary with changes to ChatGPT itself.

Browser Support

Firefox Desktop is the current development and release target. Chrome, Brave, other Chromium browsers, and additional WebExtension platforms may be evaluated after the Firefox feature set is more substantial; they are not current targets.

Development

Install Node.js 22 or newer, Firefox, and the locked development dependencies:

npm ci

Available commands:

npm run dev launches the extension in a temporary Firefox profile and reloads it when files change.
npm run lint validates the extension and treats warnings as errors.
npm run test:unit runs the node:test unit tests over test/.
npm run build creates web-ext-artifacts/search-with-chatgpt-firefox-<version>.zip.
npm test runs the same lint, unit test, and build checks used by Gitea Actions.

The generated ZIP is unsigned. Use npm run dev for local testing; signing and submission to Mozilla Add-ons remain a separate release step.

Before submitting a change, confirm that gpt <query> opens https://chatgpt.com?q=<query>, the provider remains non-default, and it can be configured in Firefox search settings.

Privacy Policy

This extension has no server, no API key, and no intermediary. Nothing is reported to Zavage Software.

Your settings are stored in your own browser profile. If you use Firefox Sync with Add-ons enabled, they sync end-to-end encrypted through your own Mozilla account.
Selection actions and the shortcut place your selected text in the ChatGPT URL. Advanced link/page actions instead place the chosen link or current page URL in the prompt. URLs may include private query parameters or fragments; use those actions only for URLs you want to share with ChatGPT.
The extension reads the selected text or relevant URL only when you invoke the action. It does not extract full page text, read page titles, or open a link itself for a safety check.
Language and confirmation dialogs hold pending content in memory only, not in settings sync or persistent storage. Canceling sends no prompt to ChatGPT. Closing or restarting Firefox discards pending actions.

Model selection

Model selection is not currently supported. We tested model URL hints while signed in and signed out, but could not make them change the selected model. Signed-out testing used Luna; signed-in testing stayed on GPT-5.6 Sol with medium effort regardless of the requested model. We removed the model setting rather than offer a control that did not work. Choose your model and thinking effort in ChatGPT itself where available. Previously saved extension model values are ignored.

Temporary chat did work in manual testing. Check ChatGPT's temporary-chat indicator before sending; web-search hints remain unverified.

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