Examine source code of Highlight & Save Notes

{
  "manifest_version": 2,
  "name": "Highlight & Save Notes",
  "version": "1.0.0",
  "description": "Highlight selected text on any page and save it to your private notes for later review.",
  "browser_specific_settings": {
    "gecko": {
      "id": "highlight-notes-f9661d07-2b5b-4a55-bfa9-40e72fce4693@example.com",
      "strict_min_version": "58.0"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "storage",
    "contextMenus"
  ],
  "browser_action": {
    "default_title": "Highlight & Save",
    "default_icon": {
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  }
}