Examine source code of BrewSearch

{
  "manifest_version": 2,
  "name": "BrewSearch",
  "version": "0.0.4",
  "description": "Look up Homebrew packages from the address bar. Created by Amado Tejada.",
  "homepage_url": "https://github.com/amadotejada/brewsearch-firefox",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "omnibox": {
    "keyword": "brew"
  },
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tejada.amado@gmail.com"
    }
  }
}