Examine source code of Issue2Clipboard

{
  "manifest_version": 2,
  "name": "Issue2Clipboard",
  "version": "0.4resigned1",
  "description": "Right-click on a JIRA issue to get its key and summary copied to the clipboard",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "issue2clipboard.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e0f99fcd-232e-49c5-ba36-ee2bd2d24039}"
    }
  }
}