Examine source code of GitHub Open Notifications

{
  "name": "GitHub Open Notifications",
  "version": "1.2resigned1",
  "manifest_version": 2,
  "description": "Extension that provides buttons on the GitHub notifications page to open them (all|all PRs|all closed|all with user...) in new tabs",
  "homepage_url": "https://github.com/janpio/github-open-notifications-extension",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "tabs",
    "https://github.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://github.com/notifications*",
        "https://github.com/*/notifications",
        "https://github.com/notifications?all=*"
      ],
      "js": [
        "lib/d3.v4.min.js",
        "src/inject/inject.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{23200428-ac5f-47b2-808b-8f272a075210}"
    }
  }
}