Image MetaHub Browser (MVP)

A minimal MV3 browser extension that saves online AI images with embedded MetaHub-compatible PNG metadata.

What it does

• Adds a discreet Save action to assistant messages that contain generated images
• Save performs a quick save with autodetected metadata and stored defaults
• Edit opens a lightweight metadata form when you want to review fields before download
• Lets you save the main image from that message and download:
  • imh-<provider>-<timestamp>.png with embedded tEXt metadata
• Uses a simplified metadata form focused on fields that make sense for LLM image chats
• Embeds richer imagemetahub_data JSON metadata in PNGs when enabled in settings

Supported sites (initial)

• chatgpt.com
• gemini.google.com
• grok.com
• x.ai

How to load (Chrome/Edge)

1. Open chrome://extensions
2. Enable Developer mode
3. Click "Load unpacked"
4. Select the D:\IMH_BROWSER folder

Notes

• This MVP embeds metadata into PNGs (tEXt parameters chunk).
• If the image is not PNG, the extension tries to convert to PNG. If conversion fails, it saves without metadata.
• Clicking the extension icon opens the settings page.

Next steps

• Tighten per-site selectors for model autodetection as the UIs evolve
• Support choosing among multiple images in the same assistant message
• Expand richer metadata coverage for more providers beyond ChatGPT and Grok