Examine source code of Improved History

{
  "version": "0.1.2resigned1",
  "manifest_version": 2,
  "default_locale": "en",
  "name": "__MSG_chrome_extension_name__",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "history",
    "<all_urls>"
  ],
  "description": "__MSG_chrome_extension_description__",
  "homepage_url": "http://eccorem.com/apps/improved-history.html",
  "icons": {
    "16": "data/icons/16.png",
    "24": "data/icons/24.png",
    "32": "data/icons/32.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png"
  },
  "browser_action": {
    "default_popup": "data/popup/popup.html",
    "default_title": "__MSG_browser_action_title__",
    "default_icon": {
      "16": "data/icons/16.png",
      "24": "data/icons/24.png",
      "32": "data/icons/32.png",
      "64": "data/icons/64.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d4e3bfcc-984f-47c2-818b-65e91103ce6c}"
    }
  }
}