Examine source code of Memo+

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.2.1",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{3582b585-3a60-4368-8e17-310b08f3357a}",
      "strict_min_version": "68.0"
    }
  },
  "icons": {
    "48": "icons/sidebar-memo-48.png",
    "96": "icons/sidebar-memo-96.png"
  },
  "browser_action": {
    "default_title": "__MSG_browserActionDefaultTitle__"
  },
  "sidebar_action": {
    "default_icon": "icons/sidebar-memo.svg",
    "default_title": "__MSG_sidebarActionDefaultTitle__",
    "default_panel": "sidebar/sidebar.html"
  },
  "background": {
    "scripts": [
      "background.js",
      "sidebar-memo.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Shift+Alt+M"
      }
    }
  },
  "permissions": [
    "activeTab",
    "menus",
    "storage"
  ]
}