Examine source code of Readable Ravelry

{
  "manifest_version": 2,
  "name": "Readable Ravelry",
  "version": "0.1.1",
  "description": "An extension to make Ravelry accessible for those sensitive to light by applying a low contrast colour scheme.",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "rr@firefox.com"
    }
  },
  "content_scripts": [
    {
      "css": [
        "styles.css"
      ],
      "js": [
        "content.js"
      ],
      "matches": [
        "https://www.ravelry.com/*"
      ],
      "run_at": "document_start"
    }
  ]
}