black blackboard

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "black blackboard",
  "version": "0.2.1",
  "description": "Changing blackboard to be actually black",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "page_action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "js": [
        "setTheme.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "matches": [
        "https://online.manchester.ac.uk/*"
      ]
    }
  ],
  "permissions": [
    "storage",
    "declarativeContent",
    "https://online.manchester.ac.uk/*"
  ],
  "web_accessible_resources": [
    "blake.css"
  ]
}