Examine source code of CrunchyrollDubDeleter

{
  "manifest_version": 2,
  "name": "CrunchyrollDubDeleter",
  "version": "1.1",
  "description": "Deletes dub listings from the simulcastcalander",
  "icons": {
    "48": "NoDub.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.crunchyroll.com/simulcastcalendar*"
      ],
      "js": [
        "removeDub.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{bdd8a2b7-3919-422e-a9a4-ce4705831915}"
    }
  }
}