Synesthetize

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Synesthetize",
  "version": "1.12",
  "manifest_version": 2,
  "description": "Color code individual characters on pages you view -- induce color-graphemic synesthesia",
  "options_page": "options.html",
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file:///*/*"
      ],
      "js": [
        "jquery-1.7.2.min.js",
        "jquery.highlight-3.js",
        "swap.js"
      ],
      "all_frames": false
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "128": "128-t.png"
  }
}