# Agent Blame

> Agent Blame highlights AI-generated lines on GitHub PRs with orange gutter marks, so you can focus code reviews on what matters. Tracks AI vs human code stats per file and across your repository.

Canonical page: [https://chrome-stats.com/d/agent-blame](https://chrome-stats.com/d/agent-blame)

## Overview

- **ID:** `agent-blame`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Murali
- **Category:** web-development
- **Daily users:** 1
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 3.1.9
- **Last updated:** 2026-02-07
- **First published:** 2026-02-04
- **Size:** 125 KB
- **Data as of:** 2026-09-05
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/agent-blame/)
- **Website:** [https://mesa.dev](https://mesa.dev/)

## Description

Agent Blame shows you which lines of code in a GitHub Pull Request were written by AI, so you can focus your code reviews where it matters.

How It Works                                                                                                                                                                                                                           
<ul><li>Orange gutter marks highlight AI-generated lines                                                                                                                                                                                     </li><li>Hover over marks to see prompt details (agent, model, and prompt text)      </li><li>Unmarked lines are human-written (clean, distraction-free UI)</li><li>File badges show AI percentage per file</li><li>PR summary shows total AI vs human code stats</li></ul>
Repository Analytics
<ul><li>Full analytics dashboard in GitHub Insights → Agent Blame</li><li>Track AI vs human code trends over time</li><li>See tool breakdown (Cursor, Claude Code, OpenCode)</li><li>Model usage statistics</li><li>Per-contributor AI usage</li><li>Commit:Prompt efficiency ratio</li><li>Filter by time period (24h, 3 days, week, month, all time)</li></ul>
Features
<ul><li>Visual markers directly on GitHub PR diff views</li><li>Works in both unified and split diff modes</li><li>Supports light and dark themes</li><li>Zero performance impact on page load</li></ul>
Requirements
<ul><li>A GitHub Personal Access Token (with repo scope)</li><li>The <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/33d006b374119e1625c2d31ae4796b7b9612bda2427e208ee495fdf853f8ee5e/https%3A//github.com/mesa-dot-dev/agentblame" rel="nofollow">https://github.com/mesa-dot-dev/agentblame</a> installed in your repositories to capture AI attribution</li></ul>
Getting Started
<ol><li>Install the extension</li><li>Click the extension icon</li><li>Add your GitHub token</li><li>Visit any PR with agentblame attribution data</li><li>Check Insights → Agent Blame for repository analytics</li></ol>
Privacy
<ul><li>Your GitHub token is stored locally, never sent to external servers</li><li>No analytics, tracking, or data collection</li><li>Open source: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/33d006b374119e1625c2d31ae4796b7b9612bda2427e208ee495fdf853f8ee5e/https%3A//github.com/mesa-dot-dev/agentblame" rel="nofollow">https://github.com/mesa-dot-dev/agentblame</a></li></ul>

## Rankings

- #84,056 — Overall
- #84 — agent
- #241 — agenda

## Permissions and access

### Permissions

- `storage`

### Host permissions

- `https://github.com/*`
- `https://api.github.com/*`

### Content script matches

- `github.com`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Request access to the following domains: github.com
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/agent-blame)