Examine source code of Jira Helpers

{
  "manifest_version": 2,
  "name": "Jira Helpers",
  "version": "1.0",
  "description": "Some stuff to make JIRA better",
  "icons": {
    "48": "icons/eye.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/eye.png"
    }
  }
}