Examine source code of TextNotes

{
  "manifest_version": 2,
  "name": "TextNotes",
  "description": "TextNotes is a note extension with various useful features.",
  "version": "1.8",
  "author": "Gabor Juhasz",
  "applications": {
    "gecko": {
      "id": "textnotes@gaborjuhaszprojects.com",
      "strict_min_version": "78.0"
    }
  },
  "background": {
    "scripts": [
      "lib/logger/log.js",
      "background/background.js"
    ]
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "contextMenus",
    "activeTab",
    "notifications"
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "icons/textnotes.svg",
      "32": "icons/textnotes.svg"
    },
    "default_title": "TextNotes"
  },
  "icons": {
    "32": "icons/textnotes.svg",
    "48": "icons/textnotes.svg",
    "96": "icons/textnotes.svg"
  },
  "commands": {
    "open-textnotes-tab": {
      "suggested_key": {
        "default": "Ctrl+Alt+O"
      },
      "description": "Open TextNotes in tab"
    },
    "open-textnotes-popup": {
      "suggested_key": {
        "default": "Ctrl+Alt+P"
      },
      "description": "Open TextNotes in popup window"
    }
  }
}