Examine source code of Procrastination Friction

{
  "manifest_version": 2,
  "name": "Procrastination Friction",
  "version": "1.0.3",
  "description": "Waste less time on the internet.",
  "icons": {
    "16": "icons/icon-active.svg",
    "32": "icons/icon-active.svg",
    "48": "icons/icon-active.svg",
    "64": "icons/icon-active.svg",
    "96": "icons/icon-active.svg",
    "128": "icons/icon-active.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.bundle.js"
      ]
    }
  ],
  "permissions": [
    "storage",
    "<all_urls>",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon-inactive.svg",
    "default_title": "Procrastination Friction",
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  }
}