Examine source code of Hatysa extension

{
  "manifest_version": 2,
  "name": "hatysa extension",
  "version": "1.14.0",
  "description": "Companion extension for the hatysa bookmark service",
  "homepage_url": "https://hatysa.com",
  "icons": {
    "16": "icons/logo-16.png",
    "24": "icons/logo-24.png",
    "32": "icons/logo-32.png",
    "48": "icons/logo-48.png",
    "128": "icons/logo-128.png"
  },
  "background": {
    "scripts": [
      "build/background.js"
    ]
  },
  "omnibox": {
    "keyword": "ld"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/logo-16.png",
      "24": "icons/logo-24.png",
      "32": "icons/logo-32.png",
      "48": "icons/logo-48.png"
    },
    "default_title": "Add bookmark (Alt+Shift+L)",
    "default_popup": "popup/index.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+L"
      },
      "description": "Open a popup to bookmark current page."
    }
  },
  "options_ui": {
    "page": "options/index.html"
  },
  "permissions": [
    "tabs",
    "storage",
    "http://*/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{30b681c8-40b0-4e84-8773-ec873fa088cb}"
    }
  }
}