Examine source code of MangaDex Reddit Button

{
  "manifest_version": 2,
  "name": "MangaDex Reddit Button",
  "version": "1.5resigned1",
  "description": "Adds a button to MangaDex chapter pages that lets you easily search for the chapter on r/manga.",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.mangadex.org/chapter/*"
      ],
      "js": [
        "add.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e9d8ec8d-8f40-4337-b0a8-3429786991ed}"
    }
  }
}