Examine source code of Jira link copy

{
  "manifest_version": 3,
  "name": "Jira link copy",
  "description": "This extension replaces Jira issue's default Copy link -implementation by making the copied link hypertext (HTML or Markdown) so that it contains issue key and issue summary thus giving a nice output for use in emails, chats, pull requests, etc. This extension relies heavily on the Jira - Better issue link by Borja Herrero.",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "juhopulakka@jiralinkcopy"
    }
  },
  "icons": {
    "48": "icons/jira_issue_copy_48.png",
    "96": "icons/jira_issue_copy_96.png"
  },
  "content_scripts": [
    {
      "js": [
        "jiralinkcopy.js"
      ],
      "matches": [
        "https://*.atlassian.net/jira/*",
        "https://*.atlassian.net/browse/*",
        "https://*.atlassian.net/issues/*"
      ]
    }
  ]
}