Examine source code of Scrap.tf Functions

{
  "browser_specific_settings": {
    "gecko": {
      "id": "scrap.tf-functions@lukesrw"
    }
  },
  "content_scripts": [
    {
      "js": [
        "js/scripts.js",
        "foreground.js"
      ],
      "matches": [
        "*://scrap.tf/sell/weapons"
      ]
    }
  ],
  "description": "Popup for executing Scrap.tf Functions",
  "icons": {
    "16": "logo.svg",
    "32": "logo.svg",
    "48": "logo.svg",
    "64": "logo.svg",
    "96": "logo.svg"
  },
  "manifest_version": 2,
  "name": "Scrap.tf Functions",
  "page_action": {
    "browser_style": true,
    "default_icon": {
      "16": "logo.svg",
      "32": "logo.svg",
      "48": "logo.svg",
      "64": "logo.svg",
      "96": "logo.svg"
    },
    "default_popup": "html/address_bar.html",
    "default_title": "Scrap.tf Functions",
    "show_matches": [
      "*://scrap.tf/sell/weapons"
    ]
  },
  "version": "1.1"
}