Examine source code of Reclaim Screen Space

{
  "name": "Reclaim Screen Space",
  "version": "1.0",
  "description": "Take back space in your browser from websites like Pinterest and Medium that block your screen with sticky headers and modals.",
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "images/reclaim-screen-16.png",
      "32": "images/reclaim-screen-32.png",
      "48": "images/reclaim-screen-48.png",
      "128": "images/reclaim-screen-128.png"
    }
  },
  "icons": {
    "16": "images/reclaim-screen-16.png",
    "32": "images/reclaim-screen-32.png",
    "48": "images/reclaim-screen-48.png",
    "128": "images/reclaim-screen-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "reclaim-screen@nanobaz.com"
    }
  },
  "applications": {
    "gecko": {
      "id": "reclaim-screen@nanobaz.com"
    }
  },
  "manifest_version": 2
}