Examine source code of rob-bugson

{
  "manifest_version": 2,
  "name": "rob-bugson",
  "version": "1.7.3",
  "description": "Add links for viewing related bugs, attaching PR to bugs, and adding merge comments to bugs.",
  "homepage_url": "https://github.com/willkg/rob-bugson",
  "icons": {
    "48": "icons/rob-bugson-48.png"
  },
  "permissions": [
    "*://github.com/*",
    "*://bugzilla.mozilla.org/*",
    "tabs"
  ],
  "background": {
    "scripts": [
      "github-bugzilla-background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://github.com/*"
      ],
      "js": [
        "github-bugzilla-content.js"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "{ab950bab-858f-4d27-ad02-7d4b96e2430a}"
    }
  }
}