Examine source code of Tid

{
  "manifest_version": 2,
  "name": "Tid",
  "version": "0.2.0",
  "author": "Linus Törngren, Etnolit",
  "description": "A simple extension for creating timers in browser tabs.",
  "homepage_url": "https://etnolit.se/tid",
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "55.0"
    }
  },
  "icons": {
    "48": "assets/icons/alarm-48.png",
    "96": "assets/icons/alarm-96.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "assets/icons/alarm-16.png",
      "32": "assets/icons/alarm-32.png"
    }
  },
  "permissions": [
    "notifications",
    "storage"
  ],
  "omnibox": {
    "keyword": "tid"
  }
}