Examine source code of uwRMP

{
  "name": "uwRMP",
  "description": "RMP extension for the University of Washington course page (MyPlan).",
  "version": "1.0.0",
  "manifest_version": 2,
  "icons": {
    "128": "assets/RMPuw.png"
  },
  "applications": {
    "gecko": {
      "id": "khazapar7@gmail.com",
      "strict_min_version": "42.0"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "khazapar7@gmail.com",
      "strict_min_version": "42.0"
    }
  },
  "permissions": [
    "activeTab",
    "webRequest",
    "webNavigation",
    "tabs",
    "https://myplan.uw.edu/course/*",
    "https://www.ratemyprofessors.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://myplan.uw.edu/course/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}