Examine source code of SCPper for Firefox

{
  "manifest_version": 2,
  "name": "SCPper",
  "version": "0.3.2.23",
  "description": "__MSG_MANIFEST_DESCRIPTION__",
  "icons": {
    "16": "scp-logo-16.png",
    "48": "scp-logo-48.png",
    "128": "scp-logo-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "cpebggobaenfndpoddkdindknnpbjdfc@fiftynine.scp",
      "strict_min_version": "42.0"
    }
  },
  "author": "Alexander \"FiftyNine\" Krivopalov",
  "default_locale": "en",
  "background": {
    "scripts": [
      "service_worker.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.reddit.com/r/SCP/*",
        "*://www.scpwiki.com/*",
        "*://www.scp-wiki.net/*",
        "*://scp-wiki.wikidot.com/*",
        "*://scpfoundation.ru/*",
        "*://scp-ru.wikidot.com/*",
        "*://scpfoundation.net/*",
        "*://ko.scp-wiki.net/*",
        "*://scpko.wikidot.com/*",
        "*://scp-wiki-cn.wikidot.com/*",
        "*://fondationscp.wikidot.com/*",
        "*://scp-wiki.net.pl/*",
        "*://scp-pl.wikidot.com/*",
        "*://lafundacionscp.wikidot.com/*",
        "*://scp-es.com/*",
        "*://scp-th.wikidot.com/*",
        "*://ja.scp-wiki.net/*",
        "*://scp-jp.wikidot.com/*",
        "*://scp-wiki-de.wikidot.com/*",
        "*://fondazionescp.wikidot.com/*",
        "*://scp-ukrainian.wikidot.com/*",
        "*://scp-pt-br.wikidot.com/*",
        "*://scp-cs.wikidot.com/*",
        "*://scp-zh-tr.wikidot.com/*"
      ],
      "js": [
        "constants.js",
        "scpUtils.js",
        "linkEnhancer.js",
        "wikiUtils.js",
        "wikiPage.js",
        "wikiForum.js",
        "wikiMain.js",
        "scpMain.js"
      ],
      "run_at": "document_start"
    }
  ],
  "externally_connectable": {
    "matches": [
      "*://www.scpwiki.com/*",
      "*://www.scp-wiki.net/*",
      "*://scp-wiki.wikidot.com/*",
      "*://scpfoundation.ru/*",
      "*://scp-ru.wikidot.com/*",
      "*://scpfoundation.net/*",
      "*://ko.scp-wiki.net/*",
      "*://scpko.wikidot.com/*",
      "*://scp-wiki-cn.wikidot.com/*",
      "*://fondationscp.wikidot.com/*",
      "*://scp-wiki.net.pl/*",
      "*://scp-pl.wikidot.com/*",
      "*://lafundacionscp.wikidot.com/*",
      "*://scp-es.com/*",
      "*://scp-th.wikidot.com/*",
      "*://ja.scp-wiki.net/*",
      "*://scp-jp.wikidot.com/*",
      "*://scp-wiki-de.wikidot.com/*",
      "*://fondazionescp.wikidot.com/*",
      "*://scp-ukrainian.wikidot.com/*",
      "*://scp-pt-br.wikidot.com/*",
      "*://scp-cs.wikidot.com/*",
      "*://scp-zh-tr.wikidot.com/*"
    ]
  },
  "web_accessible_resources": [
    "constants.js",
    "scpEventOverrides.js"
  ],
  "permissions": [
    "storage",
    "*://www.scpper.com/*",
    "*://scpper.com/*",
    "*://www.scpwiki.com/*",
    "*://www.scp-wiki.net/*",
    "*://scp-wiki.wikidot.com/*",
    "*://scpwiki.com/*",
    "*://scpfoundation.ru/*",
    "*://scp-ru.wikidot.com/*",
    "*://scpfoundation.net/*",
    "*://ko.scp-wiki.net/*",
    "*://scpko.wikidot.com/*",
    "*://scp-wiki-cn.wikidot.com/*",
    "*://fondationscp.wikidot.com/*",
    "*://scp-wiki.net.pl/*",
    "*://scp-pl.wikidot.com/*",
    "*://lafundacionscp.wikidot.com/*",
    "*://scp-es.com/*",
    "*://scp-th.wikidot.com/*",
    "*://ja.scp-wiki.net/*",
    "*://scp-jp.wikidot.com/*",
    "*://scp-wiki-de.wikidot.com/*",
    "*://fondazionescp.wikidot.com/*",
    "*://scp-ukrainian.wikidot.com/*",
    "*://scp-pt-br.wikidot.com/*",
    "*://scp-cs.wikidot.com/*",
    "*://scp-zh-tr.wikidot.com/*"
  ],
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlqyT7a4GyVofLYIrkTp/v61fhDAaVsPgWY4Go/TNBAfvuOOyrNmblHBKxCiahhwr20Gjb6Py9AFOKIHI9xhUnDzNzFXtXj4yV4EVn7A/6ojxpix5KkSu2+7w0smgv2RlQdcZ2TAEfWOPJhctLkIwp2DrwYeVI5HdeJ/bE1WSsGJEiXKmdxFQGJYc3n5uvZoRSz65UV3AuZmrgr7cBk+AKnakpdsd0r375CbLPu+bBEGfu2u2hatReUraPot+3ocdQox0dJB6dQ7TyjckUGFQKrr8MAmq6TtK1ihvHwgTB72Jk+MxkmlDdye77U8mJcXS6MZb+WEAgvmdCmDEisAXTQIDAQAB"
}