manifest.json

{
  "short_name": "MBFCext",
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "author": "Mike Crowe",
  "manifest_version": 2,
  "background": {
    "scripts": ["scripts/background.js"]
  },
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_icon": "icons/icon128.png",
    "default_popup": "popup.html",
    "default_title": "MBFC"
  },
  "permissions": [
    "alarms",
    "*://facebook.com/*",
    "*://*.facebook.com/*",
    "*://twitter.com/*",
    "*://*.twitter.com/*",
    "storage",
    "tabs"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": ["*://facebook.com/*", "*://*.facebook.com/*"],
      "run_at": "document_start",
      "js": ["scripts/facebook.js"],
      "css": ["css/svg-with-js.min.css", "css/facebook.css"]
    },
    {
      "matches": ["*://twitter.com/*", "*://*.twitter.com/*"],
      "run_at": "document_start",
      "js": ["scripts/twitter.js"],
      "css": ["css/svg-with-js.min.css", "css/twitter.css"]
    }
  ],
  "web_accessible_resources": ["images/*", "css/*", "icons/*"]
}