Examine source code of Element-Hider

{
  "manifest_version": 2,
  "name": "Element-Hider",
  "version": "1.2",
  "author": "David Stevens",
  "homepage_url": "https://github.com/olusername91/element-hider",
  "description": "Pressing control and shift keys, double click away any element you want to hide. Control + shift + z to undo.",
  "icons": {
    "48": "eh48.png",
    "96": "eh96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src.js"
      ]
    }
  ]
}