Gemini Thought Mode Default (Chrome Extension)

A Manifest V3 extension that keeps gemini.google.com in Thought mode by default, with a popup toggle.

Features

• Auto-select Thought mode on Gemini page load.
• Re-apply on SPA route changes and key DOM updates.
• Popup toggle to enable or disable automation.
• Silent failure behavior when selectors no longer match (logs only).

Project Structure

• manifest.json
• src/background/service-worker.js
• src/content/auto-thought.js
• src/popup/popup.html
• src/popup/popup.js
• src/common/storage.js
• assets/icon-16.png
• assets/icon-32.png
• assets/icon-48.png
• assets/icon-128.png
• PRIVACY.md

Local Install

1. Open chrome://extensions.
2. Enable Developer mode.
3. Click Load unpacked.
4. Select /Users/etins/研究/gemini-thought-mode-extension.
5. Open https://gemini.google.com/ and test behavior.

Store Readiness Notes

• Uses minimum required permission: storage.
• Host is restricted to https://gemini.google.com/*.
• No data collection or external network calls.

QA Checklist

1. First install defaults to enabled.
2. Toggle OFF in popup, refresh Gemini, no auto-selection.
3. Toggle ON in popup, auto-selection resumes.
4. Navigate between Gemini conversations, automation still works.
5. If Gemini DOM changes and no button is found, extension stays silent and logs events.

Changelog

0.1.1

• Fixed reliability of auto-switching to Thought mode after conversation changes.
• Added safer click handling to avoid interfering with manual mode selection.
• Improved mode detection and periodic re-check when Gemini falls back to Fast mode.