Examine source code of hsbhv-timetable

{
  "manifest_version": 2,
  "name": "hsbhv-timetable",
  "version": "2.2",
  "description": "Personal customization for the timetable on hs-bremerhaven.de",
  "permissions": [
    "contextMenus",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.hs-bremerhaven.de/fb2/sose*.php*",
        "*://*.hs-bremerhaven.de/fb2/ws*.php*",
        "*://*.hs-bremerhaven.de/fb2/wise*.php*"
      ],
      "css": [
        "content_scripts/inject.css"
      ],
      "js": [
        "content_scripts/inject.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "popup/timetable.png",
    "default_title": "hsbhv timetable",
    "default_popup": "popup/settings.html"
  },
  "background": {
    "scripts": [
      "background_scripts/context_menu.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5b391c97-3314-4b9d-ad7f-44200f8bd659}"
    }
  }
}