Firefox:
  1. Install Greasemonkey
  2. Install xch
Chrome:
  1. Download xch to your computer (save as...)
  2. Open chrome://extensions in your browser
  3. Drag and drop the xch.user.js file into the tab
Firefox:
  1. Update xch through Greasemonkey
Chrome:
  1. Download xch to your computer (save as...)
  2. Open chrome://extensions in your browser
  3. Update xch by dragging xch.user.js into the tab

xch is a userscript for Tinyboard-based image boards designed to make enhance browsing capabilities.

Also included in xch is an API to allow interaction with other scripts. Check here for API documentation.