Examine source code of Rover

{
  "description": "Rewrite outgoing request URLs",
  "manifest_version": 2,
  "name": "Rover",
  "applications": {
    "gecko": {
      "id": "isaacjsnow@gmail.com"
    }
  },
  "version": "0.0.2resigned1",
  "homepage_url": "https://github.com/ijsnow/rover",
  "icons": {
    "48": "assets/48x48/rover.svg",
    "96": "assets/96x96/rover.svg"
  },
  "permissions": [
    "storage",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.bundle.js"
      ],
      "run_at": "document_start"
    }
  ],
  "omnibox": {
    "keyword": "rover"
  }
}