manifest.json

{
  "manifest_version": 2,
  "name": "Symfony Profiler Addon",
  "description": "This addon provides easy access to the Symfony Profiler information when it's available for the current web page, even if the toolbar isn't present.",
  "version": "1.0",
  "icons": {
	  "128": "icon-128.png",
	  "48": "icon-48.png"
  },
  "browser_action": {
    "default_icon": "icon-disabled-38.png"
  },
  "background": {
    "persistent": true,
    "page": "background.html"
  },
  "permissions": [
    "<all_urls>",
    "tabs",
    "webRequest",
    "activeTab"
  ]
}