manifest.json

{
  "manifest_version": 2,

  "name": "Feature Queries Manager",
  "short_name": "FQM",
  "description": "Manage and toggle CSS on a page behind a @supports Feature Query.",
  "version": "0.3",

  "permissions": [
    "tabs",
    "activeTab",
    "<all_urls>"
  ],

  "background": {
    "scripts": ["browser-polyfill.js", "background.js"]
  },

  "devtools_page": "devtools/index.html",

  "content_scripts": [{
    "matches": ["<all_urls>"],
    "js": ["browser-polyfill.js", "content/content.js"]
  }],

  "icons": {
    "128": "images/icon@128.png",
    "64": "images/icon@64.png",
    "16": "images/icon@16.png",
    "48": "images/icon@48.png"
  }
}