Examine source code of Intercept Redirect

{
  "background": {
    "scripts": [
      "index.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon128.png"
  },
  "description": "Skip tracking redirects that serve no purpose other than to waste your valuable time.",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "manifest_version": 2,
  "name": "Intercept Redirect",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://bhpz.adj.st/",
    "*://app.adjust.com/jsr",
    "*://edgeservices.bing.com/edgesvc/redirect",
    "*://c212.net/c/link",
    "*://*.curseforge.com/linkout",
    "*://clickserve.dartsearch.net/link/click",
    "*://github-redirect.dependabot.com/",
    "*://*.digidip.net/visit",
    "*://disq.us/url",
    "*://cj.dotomi.com/links-t/*",
    "*://console.ebsta.com/linktracking/track.aspx",
    "*://redirect.epicgames.com/*",
    "*://exit.sc/",
    "*://facebook.com/flx/warn/",
    "*://l.facebook.com/l.php",
    "*://lm.facebook.com/l.php",
    "*://m.facebook.com/flx/warn/",
    "*://gate.sc/",
    "*://www.google.co.jp/imgres",
    "*://www.google.co.jp/url",
    "*://news.url.google.com/url",
    "*://plus.url.google.com/url",
    "*://www.google.com/imgres",
    "*://www.google.com/url",
    "*://www.google.se/imgres",
    "*://www.google.se/url",
    "*://www.googleadservices.com/pagead/aclk",
    "*://href.li/",
    "*://l.instagram.com/",
    "*://www.javlibrary.com/cn/redirect.php",
    "*://www.javlibrary.com/en/redirect.php",
    "*://www.javlibrary.com/ja/redirect.php",
    "*://www.javlibrary.com/tw/redirect.php",
    "*://r.klar.na/",
    "*://www.kraken.com/redirect",
    "*://t.lever-analytics.com/email-link",
    "*://www.linkedin.com/redir/redirect",
    "*://www.linkedin.com/safety/go",
    "*://l.messenger.com/l.php",
    "*://outgoing.prod.mozaws.net/v1/*",
    "*://prod.outgoing.prod.webservices.mozgcp.net/v1/*",
    "*://static.teams.cdn.office.net/evergreen-assets/safelinks/1/atp-safelinks.html",
    "*://onlyf**s.com/away",
    "*://*.safelinks.protection.outlook.com/",
    "*://slack-redir.net/link",
    "*://steamcommunity.com/linkfilter/",
    "*://www.tiktok.com/link/v2",
    "*://toyhou.se/~r",
    "*://twitter.com/i/redirect",
    "*://t.umblr.com/redirect",
    "*://vk.com/away.php",
    "*://workable.com/nr",
    "*://www.youtube.com/redirect"
  ],
  "version": "8.15.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{615cf743-ea5c-444c-819e-159401137960}"
    }
  }
}