Examine source code of Pbinfo Improver

{
  "manifest_version": 2,
  "name": "Pbinfo Improver",
  "version": "1.1.1",
  "description": "Automatically redirects to your preferred Pbinfo UI and puts the tags inside a spoiler",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png",
    "256": "icons/256.png"
  },
  "permissions": [
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "browser_action": {
    "default_popup": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.old.pbinfo.ro/*"
      ],
      "js": [
        "oldredirect.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.www.pbinfo.ro/*",
        "*://pbinfo.ro/*"
      ],
      "js": [
        "wwwredirect.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.new.pbinfo.ro/*"
      ],
      "js": [
        "newredirect.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.pbinfo.ro/*"
      ],
      "js": [
        "unspoiler.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "pbinfoimprover@ridiche.me"
    }
  }
}