Examine source code of SimplePocket

{
  "manifest_version": 3,
  "name": "SimplePocket",
  "version": "1.1.11",
  "description": "A minimal Firefox read-it-later addon inspired by Pocket.",
  "permissions": [
    "activeTab",
    "tabs",
    "bookmarks",
    "contextMenus",
    "storage"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "SimplePocket",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    }
  },
  "page_action": {
    "default_title": "SimplePocket: Click to save this page",
    "default_icon": {
      "19": "icons/page-icon-unsaved-bw-19.png",
      "38": "icons/page-icon-unsaved-bw-38.png"
    },
    "show_matches": [
      "http://*/*",
      "https://*/*"
    ]
  },
  "commands": {
    "save-current-page": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y",
        "mac": "Command+Shift+Y"
      },
      "description": "Save the current page to SimplePocket"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "simple-pocket@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}