Examine source code of Kill Sticky

{
  "manifest_version": 2,
  "name": "Kill Sticky",
  "version": "1.9",
  "description": "Kill off the annoying floating things blocking the website you're trying to see",
  "icons": {
    "32": "icons/32t.png",
    "48": "icons/48t.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab"
  ],
  "optional_permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/32t.png",
    "default_title": "Kill Sticky"
  },
  "commands": {
    "kill-sticky": {
      "suggested_key": {
        "default": "Ctrl+Shift+F"
      },
      "description": "Hide those sticky objects"
    }
  }
}