Examine source code of TimeConvert

{
  "manifest_version": 2,
  "version": "0.1.2",
  "name": "TimeConvert",
  "description": "Convert time to h",
  "icons": {
    "192": "logo192.png",
    "512": "logo512.png"
  },
  "homepage_url": "https://github.com/nzambello/timeconvert",
  "browser_specific_settings": {
    "gecko": {
      "id": "{a54ce314-67ca-498f-ba4e-9192a392ec79}"
    }
  },
  "browser_action": {
    "default_icon": "logo192.png",
    "theme_icons": [
      {
        "light": "logo192.png",
        "dark": "logo192.png",
        "size": 192
      }
    ],
    "default_title": "TimeConvert",
    "default_popup": "index.html",
    "browser_style": true
  }
}