Examine source code of Paste link to jira

{
  "manifest_version": 2,
  "name": "Paste link to jira",
  "version": "1.0.1",
  "description": "Adds option to paste link to a last open jira tab",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{7395164b-7fe6-4bd1-98eb-38b280d83f7f}"
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "contextMenus",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_title": "My Extension",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js"
      ]
    }
  ]
}