Examine source code of Copy HTML link

{
  "manifest_version": 2,
  "name": "Copy HTML link",
  "version": "0.1.5080resigned1",
  "version_name": "0.1.5079 release",
  "description": "Copy HTML link",
  "author": "Ian Bicking",
  "homepage_url": "https://github.com/ianb/copy-url-extension/",
  "icons": {
    "48": "copy-link.svg"
  },
  "applications": {
    "gecko": {
      "id": "copy-html-link@ianbicking.org",
      "strict_min_version": "57.0a1"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "page_action": {
    "browser_style": true,
    "default_icon": {
      "19": "copy-link.svg"
    },
    "default_title": "Copy HTML link",
    "show_matches": [
      "<all_urls>"
    ]
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "clipboardWrite"
  ]
}