Examine source code of SaveURI

{
  "manifest_version": 2,
  "name": "SaveURI",
  "version": "2.1resigned1",
  "description": "Saves the page's internet address in the page for future reference.",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "saveuri.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8EBAB97C-949A-474c-882F-9FD228F65430}"
    }
  }
}