Angle Finder - Measure Angles Anywhere от Ratel

Angle Finder brings a lightweight protractor workflow to Firefox. Use the sidebar tool when you need a focused angle-measurement workspace, or click the toolbar button on a target page and toggle the webpage overlay to place draggable measuring points directly over visible webpage content.

Useful for geometry examples, design and layout reviews, diagrams, images, online documents, and browser-based references.

Key features:
- Sidebar angle finder with draggable vertex and endpoints
- Optional webpage overlay for measuring directly on the active tab
- Snap-to-15°, lock, reset, and screenshot helpers
- Local measurement with no account required