Examine source code of Must Prioritize

{
  "manifest_version": 2,
  "name": "Must Prioritize",
  "version": "1.2resigned1",
  "description": "Require selecting priority when filing bug to given components.",
  "icons": {
    "96": "icon-96.png"
  },
  "applications": {
    "gecko": {
      "id": "must-prioritize@upsuper.org",
      "strict_min_version": "60.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://bugzilla.mozilla.org/enter_bug.cgi?*",
        "https://bugzilla-dev.allizom.org/enter_bug.cgi?*"
      ],
      "js": [
        "must-prioritize.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}