Examine source code of MTG Collection Lens

{
  "manifest_version": 3,
  "name": "MTG Collection Lens",
  "version": "2.2",
  "description": "Highlights occurrences of cards from your collection on EDHREC, Scryfall, MTGGoldfish, MTGDecks, and MTGTop8.",
  "icons": {
    "16": "logo_a.png",
    "32": "logo_a.png",
    "48": "logo_a.png",
    "128": "logo_a.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.edhrec.com/*",
        "*://edhrec.com/*",
        "*://*.scryfall.com/*",
        "*://scryfall.com/*",
        "*://*.mtggoldfish.com/*",
        "*://*.mtgdecks.net/*",
        "*://*.mtgtop8.com/*",
        "*://*.tcgplayer.com/*",
        "*://*.manapool.com/*",
        "*://*.cardmarket.com/*",
        "*://*.cardkingdom.com/*",
        "*://*.starcitygames.com/*",
        "*://*.mtgstocks.com/*",
        "*://*.facetofacegames.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "background": {
    "type": "module",
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "*://*.moxfield.com/*",
    "*://*.deckbox.org/*",
    "*://*.archidekt.com/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "MTG Collection Lens Settings",
    "default_icon": {
      "16": "logo_a.png",
      "32": "logo_a.png",
      "48": "logo_a.png",
      "128": "logo_a.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "mtg-collection-lens@extension",
      "strict_min_version": "109.0"
    }
  }
}