Examine source code of eFast Object Finder

{
  "manifest_version": 2,
  "name": "eFast Object Finder",
  "description": "The eFast Object Finder Extension discovers web element attributes, offering unique XPath and CSS Selectors.",
  "version": "1.2.0",
  "icons": {
    "16": "images/logo-16.png",
    "48": "images/logo-48.png",
    "128": "images/logo-128.png"
  },
  "browser_action": {
    "default_title": "__MSG_extDefaultTitle__"
  },
  "sidebar_action": {
    "default_title": "My sidebar",
    "default_panel": "side-panel/side-panel.html",
    "default_icon": "images/logo-128.png",
    "open_at_install": false
  },
  "permissions": [
    "webRequest",
    "activeTab",
    "tabs",
    "storage",
    "unlimitedStorage",
    "<all_urls>"
  ],
  "devtools_page": "devtools-panel/devtools.html",
  "background": {
    "scripts": [
      "extension/background.js"
    ]
  },
  "content_scripts": [
    {
      "all_frames": true,
      "css": [
        "scripts/content.css"
      ],
      "js": [
        "scripts/inspect.js",
        "scripts/html2canvas.min.js",
        "scripts/content-script.js"
      ],
      "match_about_blank": true,
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{13885c41-e7e6-4f7a-a14e-c1dd8d70f24c}"
    }
  }
}