Examine source code of No More Blur

{
  "manifest_version": 2,
  "name": "No More Blur",
  "version": "1.0",
  "description": "Forces images to render with discrete pixels to reduce blur when upscaling.",
  "icons": {
    "48": "blur.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "injectcss.js"
      ]
    }
  ],
  "permissions": [
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8e560346-aed9-4994-9211-ddada9d3184a}"
    }
  }
}