Log in
Preview of Margin

Margin by Scan

Write in the margins of the web. Annotate any URL with AT Protocol.

5 (2 reviews)
Download Firefox and get the extension
Download file
Screenshots
A screenshot of the Margin Extension
About this extension
Annotate and highlight any webpage, with your notes saved to the decentralized AT Protocol.

Features:
  • Bookmark - Save any page on the web and revisit it later
  • Highlight - Mark important information you want to reference later
  • Annotate - Add notes to anything on the web, like, reply, and view other users' annotations

Keyboard Shortcuts:
  • Alt+M - Open sidebar
  • Alt+A - Annotate selection
  • Alt+H - Highlight selection
  • Alt+B - Bookmark page

(Customize in about:addons → ⚙️ → Manage Extension Shortcuts)

How to Use:

Sidebar: Right-click anywhere on the page → Margin → Open Sidebar

Popup: Click the Margin icon in your toolbar

Annotate/Highlight Text: Select text → right-click → Margin → Annotate or Highlight
Developer comments
Margin is open-source, you can report any issues or contribute in the GitHub repository

To report vulnerabilities, email us at hello@margin.at, IT IS IMPORTANT THAT YOU DO NOT SHARE ANY CRITICAL VULNERABILITIES PUBLICLY
Rated 5 by 2 reviewers

Star rating saved

5
2
4
0
3
0
2
0
1
0
Permissions and data

Required permissions:

  • Access browser tabs
  • Access your data for all websites

Optional permissions:

  • Access your data for all websites

Data collection:

  • The developer says this extension doesn't require data collection.
Learn more
More information
Version
0.2.2
Size
123.43 KB
Last updated
3 days ago (Feb 5, 2026)
Version History
Add to collection
Report this add-on
Support this developer

The developer of this extension asks that you help support its continued development by making a small contribution.

Contribute now