Examine source code of BitAccelerate

{
  "manifest_version": 2,
  "name": "BitAccelerate",
  "version": "1.0",
  "applications": {
    "gecko": {
      "id": "ff@bitaccelerate.com"
    }
  },
  "description": "Accelerate Unconfirmed Bitcoin Transaction for Free",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png",
    "512": "icon512.png"
  },
  "background": {
    "scripts": [
      "bitaccelerate.js"
    ]
  },
  "omnibox": {
    "keyword": "acc"
  },
  "permissions": [
    "https://bitaccelerate.com/*"
  ],
  "homepage_url": "https://bitaccelerate.com/"
}