Examine source code of Deep Focus

{
  "name": "DeepFocus",
  "version": "1.1",
  "description": "Blocks distracting websites and helps you stay focused.",
  "manifest_version": 3,
  "developer": {
    "name": "Armen-Jean Andreasian",
    "url": "https://github.com/Armen-Jean-Andreasian"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "deepfocus@armenjeanandreasian",
      "strict_min_version": "109.0"
    }
  },
  "icons": {
    "16": "bin/icon/icons/icon-16.png",
    "48": "bin/icon/icons/icon-48.png",
    "128": "bin/icon/icons/icon-128.png"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "19": "bin/icon/action/icon-19.png",
      "38": "bin/icon/action/icon-38.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": false
  },
  "permissions": [
    "webNavigation",
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ]
}