Examine source code of flexy_quote

{
  "manifest_version": 2,
  "name": "flexy_quote",
  "version": "1.0.0.3",
  "homepage_url": "https://windy-dunes.infinityfreeapp.com/flexy_quote/",
  "description": "Copy quotations using your set of templates",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*",
        "file:///*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "browser_action": {
    "default_title": "Copy selection",
    "default_icon": {
      "16": "icons/quotation_16.png",
      "32": "icons/quotation_32.png"
    },
    "default_popup": "popup/popup.htm"
  },
  "applications": {
    "gecko": {
      "id": "aleksey_tkachenko@hotmail.com"
    }
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true,
    "open_in_tab": false
  },
  "icons": {
    "16": "icons/quotation_16.png",
    "32": "icons/quotation_32.png",
    "48": "icons/quotation_48.png",
    "96": "icons/quotation_96.png"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "clipboardWrite",
    "storage"
  ]
}