Examine source code of Stample

{
  "manifest_version": 2,
  "name": "Stample",
  "version": "0.5.0",
  "author": "Stample dev team",
  "description": "This extension allows you to add content from the web to your Stample account",
  "icons": {
    "16": "icons/icon16.png",
    "19": "icons/icon19.png",
    "20": "icons/icon20.png",
    "30": "icons/icon30.png",
    "32": "icons/icon32.png",
    "40": "icons/icon40.png",
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "19": "icons/icon19.png",
      "20": "icons/icon20.png",
      "30": "icons/icon30.png",
      "32": "icons/icon32.png",
      "40": "icons/icon40.png",
      "48": "icons/icon48.png",
      "64": "icons/icon64.png",
      "128": "icons/icon128.png"
    },
    "default_title": "Stample",
    "default_popup": "popup.html"
  },
  "permissions": [
    "*://*/*",
    "activeTab",
    "tabs"
  ]
}