Gemini Web Utility

Gemini Web Utility is a Manifest V3 Chrome extension that adds focused quality-of-life improvements to the Gemini web app.

It stays inside Gemini's existing interface instead of replacing it with a separate dashboard or popup-driven workflow. The goal is simple: make Gemini feel cleaner, faster, and less frustrating for people who use it heavily.

At a Glance

• fixes real Gemini paper cuts instead of layering on a separate workflow
• keeps everything in-page, including settings, export, and copy improvements
• ships as a modern Manifest V3 extension for current Chrome

Why It Exists

Gemini already does a lot well, but the web app still has a few rough edges that show up quickly in day-to-day use:

• copied responses can include extra wrapper text
• copied code can include visual gutter noise
• long responses can stay collapsed
• useful export/share paths are missing
• generated images can still carry an in-app watermark

Gemini Web Utility fixes those problems in place, without trying to redesign the whole product.

Highlights

• Clean Copy Standard text selection copy no longer prepends Gemini said.
• Copy as Markdown Copy Gemini responses as Markdown when you want clean notes, docs, or issue comments.
• Code Block Copy Fix Remove line-number and gutter noise from copied code blocks.
• GU Settings Panel Toggle features on and off, rebind shortcuts, and reset everything back to defaults from the in-page menu.
• Auto-Expand Responses Automatically open truncated Gemini responses when an expand control is visible.
• Export Conversation Save the current conversation as a local Markdown file named after the chat.
• Watermark Removal Remove the visible watermark from Gemini-generated images inside the web app.

Before / After

Clean Copy:

Before:
Gemini said
I like potatoes

After:
I like potatoes

Export Conversation:

Before:
google-gemini

After:
Fixture Conversation.md

Architecture

The extension is intentionally small:

• content_script.js Runs inside Gemini pages, injects the GU UI, handles copy/export/shortcut behavior, and coordinates image cleanup.
• service_worker.js Provides the Manifest V3 fetch bridge needed for Gemini image processing.
• tests/ Covers pure logic, MV3 extension behavior, and optional live Gemini validation through Playwright.

Privacy

Privacy policy:

https://7dev.io/gemini-web-utility/privacy-policy

Installation

Chrome Web Store submission packaging is ready. Until the listing is live, install from source:

1. Open chrome://extensions or the Chromium equivalent.
2. Enable Developer Mode.
3. Choose Load unpacked.
4. Select this repo folder.

If you want the packaged submission artifact locally, build it with:

npm run build:zip

Permissions

The extension requests:

• storage For local feature settings and shortcut preferences.
• https://gemini.google.com/* To run on Gemini pages.
• https://*.googleusercontent.com/*
• https://lh3.google.com/* To fetch Gemini-generated image resources needed for local image cleanup.

Development

Install dependencies:

npm install

Run the core automated suite:

npm test

Build a Chrome Web Store zip:

npm run build:zip

Run the optional live authenticated Gemini check:

GWU_RUN_LIVE=1 \
GWU_LIVE_CHAT_URL=https://gemini.google.com/app/<chat-id> \
npm run test:live

Optional:

• GWU_LIVE_PROFILE_DIR=/path/to/persistent/chromium/profile

Testing

The repo includes three test layers:

• unit tests for core transformation logic
• MV3 Playwright tests against local fixture pages
• optional live Gemini validation with an authenticated Chromium profile

Status

• Current public pre-1.0 line: 0.9.15
• 1.0.0 is intentionally reserved for the final release line after public-launch validation.

License

MIT