IdentiFont

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "IdentiFont",
  "description": "This extension displays the font of an html element on hover.",
  "version": "1.2",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "css": [
        "core.css"
      ],
      "js": [
        "core.js"
      ],
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "./images/logo.png"
  }
}