Examine source code of Pocket Editor

{
  "applications": {
    "gecko": {
      "strict_min_version": "62.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "sidebar_action": {
    "default_icon": "./icons/note.svg",
    "default_title": "Pocket Editor",
    "default_panel": "./sidebar.html"
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "./icons/note.svg",
    "default_title": "Pocket Editor"
  },
  "background": {
    "scripts": [
      "./background.js"
    ]
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      }
    }
  },
  "icons": {
    "16": "./icons/16.png",
    "32": "./icons/32.png",
    "48": "./icons/48.png",
    "64": "./icons/64.png",
    "128": "./icons/128.png"
  },
  "description": "__MSG_extensionDescription__",
  "homepage_url": "https://github.com/k5md/Pocket-Editor-webextension",
  "manifest_version": 2,
  "name": "Pocket Editor",
  "version": "0.5.0",
  "default_locale": "en"
}