Examine source code of Style Guide Generator

{
  "manifest_version": 2,
  "name": "Style Guide Generator",
  "version": "1.2resigned1",
  "description": "Generate simple style guide from page's CSS.",
  "homepage_url": "https://github.com/saintsebastian/sg-gen",
  "icons": {
    "48": "icons/sg-gen-48.png",
    "96": "icons/sg-gen-96.png"
  },
  "permissions": [
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/sg-gen-32.png",
    "default_title": "SG"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{625dc76f-1ebd-4a36-92c9-ba7310d53cc7}"
    }
  }
}