Examine source code of Mobile Tooltip

{
  "manifest_version": 2,
  "name": "Mobile Tooltip",
  "description": "By default, on Android, tooltips are cut off if they are too long. This extension adds an option to view the full tooltip.",
  "version": "0.0.2resigned1",
  "permissions": [
    "<all_urls>",
    "menus",
    "contextMenus"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "js": [
        "tooltip.js"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "{6c2a1575-2c30-4af6-ad21-217920ccf582}"
    }
  }
}