Examine source code of Copy All Tabs

{
  "icons": {
    "48": "icons/icon-bw.svg",
    "96": "icons/icon-bw.svg"
  },
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "clipboardWrite",
    "clipboardRead"
  ],
  "options_ui": {
    "page": "settings.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_title": "Copy All Tabs",
    "default_popup": "tabs.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@copyalltabs"
    }
  },
  "web_accessible_resources": [
    "images/settings.svg"
  ],
  "manifest_version": 2,
  "name": "Copy All Tabs",
  "version": "0.0.10",
  "description": "Copy All Tabs is a Firefox Add-on that takes the address and title for each tab and creates a text list of links. The list is copied to your clipboard so you can paste it to notes. You can also open tabs from a previously saved list of links.",
  "homepage_url": "https://github.com/charlesbrandt/copy_all_tabs"
}