Line Reader

A minimal Chrome extension that draws a horizontal guide line following your cursor to help track long lines of text.

Chrome Web Store · Privacy Policy · License

Features

• Horizontal guide that follows the mouse cursor
• Adjustable height, opacity, and color
• Works on most websites; toggle anytime
• No analytics, no remote calls

Install

From Chrome Web Store

Open the Chrome Web Store listing and click Add to Chrome.

Developer install

1. Download or clone this repository.
2. Open chrome://extensions, enable Developer mode.
3. Click Load unpacked and select the project folder.

Usage

1. Click the extension icon to open the popup.
2. Set line height, opacity, and color.
3. Move the mouse to read with the guide line.

Permissions

• storage — stores your preferences locally via chrome.storage.
• tabs — used only to target the active tab and send a toggle/message. No page content or history is read.
• Content scripts / host access — injects the guide into pages you visit. Processing stays in the browser.

Privacy

Line Reader does not collect, transmit, or sell personal data. Settings are stored locally. See the Privacy Policy.

File layout

• manifest.json — MV3 manifest
• content.js — draws and updates the guide line
• popup.html, popup.js — UI for settings
• icon16.png, icon32.png, icon48.png, icon128.png — extension icons
• PRIVACY-POLICY.md, LICENSE

Build and development

No build step required. Edit files and reload the extension at chrome://extensions.

Troubleshooting

• Guide not visible: check the popup toggle and opacity.
• Overlapping site UI: reduce height or opacity in settings.

License

MIT. See LICENSE. You may apply a different license to icons/branding if needed.

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Copyright © 2025. Line Reader.