SideBlock

SideBlock is a Chrome Manifest V3 extension that opens websites inside the side panel and applies a lightweight filter list based on uBlock-style filter sources.

Features

• Browse sites inside the side panel.
• Switch between desktop and mobile view.
• Toggle the filter list on and off from the toolbar.
• Restore the last opened URL and view mode.
• Uses JetBrains Mono and a minimal AMOLED-black UI.

Install locally

1. Open chrome://extensions in Chrome.
2. Enable Developer mode.
3. Click Load unpacked.
4. Select this cloned folder: sideblock.

Project structure

• manifest.json - extension manifest and permissions.
• background.js - filter fetching, rule conversion, and session rule management.
• sidepanel.html - side panel markup.
• sidepanel.css - side panel styling.
• sidepanel.js - UI behavior and state handling.
• content.js - page-level content script.
• mobile_ua_rules.json - mobile user-agent rule data.
• icons/ - toolbar and extension icons.

Notes

• The extension uses declarativeNetRequest session rules for blocking.
• The filter list can be turned off from the toolbar without removing saved state.
• If you update the icon set, keep manifest.json aligned with the available files in icons/.

Development

There is no build step. Edit the files directly and reload the unpacked extension in Chrome to test changes.