Examine source code of Restyle Genealogy

{
  "manifest_version": 2,
  "name": "Restyle Genealogy",
  "description": "Adds a button to toggle certain style changes for genealogy sites, currently only the family of Ancestry",
  "author": "quassy",
  "homepage_url": "https://github.com/quassy/restyle-genealogy/",
  "version": "0.1.1resigned1",
  "permissions": [
    "https://www.ancestry.com/*",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "page_action": {
    "default_icon": "icons/off.svg",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b13ee88f-c1e3-4c38-b0f4-5feddd977b60}"
    }
  }
}