Examine source code of Nine Notes

{
  "manifest_version": 2,
  "name": "Nine Notes",
  "description": "Create notes in your sidebar and navigate among them in tab-like fashion.",
  "version": "0.10.0",
  "author": "Artyom Babiy",
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "sidebar_action": {
    "default_title": "Nine Notes",
    "default_panel": "sidebar/sidebar.html",
    "default_icon": "icon.svg"
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon.svg",
    "default_title": "Nine Notes"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Shift+Alt+N"
      },
      "description": "Show Nine Notes"
    }
  },
  "permissions": [
    "storage",
    "menus",
    "tabs",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "contact@gingerman.me"
    }
  }
}