workzilla-extention/manifest.json

{
  "manifest_version": 2,
  "name": "Workzilla Watcher",
  "version": "1.0",
  "description": "Adds functionality to workzilla.org notifications",
  "icons": {
    "48": "icons/wkznot.png"
  },
  "applications": {
    "gecko": {
      "id": "something@mozilla.org",
      "strict_min_version": "45.0"
    }
  },
  "content_scripts": [
    {
      "matches": ["https://client.work-zilla.com/freelancer"],
      "js": ["wrkzll.js"]
    }
  ]
}