Examine source code of Scanlate downloader

{
  "name": "Manga downloader",
  "version": "1.11.2",
  "description": "Download manga from scanlate websites",
  "manifest_version": 2,
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "src/scripts/background/background.js"
    ]
  },
  "browser_action": {
    "default_title": "manga downloader",
    "default_popup": "src/scripts/popup/popup.html"
  },
  "permissions": [
    "storage",
    "tabs",
    "tabHide",
    "downloads",
    "webNavigation",
    "webRequest",
    "webRequestBlocking",
    "*://*/*",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://mangalib.me/*",
        "https://mangalib.org/*",
        "https://v1.yaoilib.net/*",
        "https://hentailib.me/*",
        "https://slashlib.me/*",
        "https://v2.slashlib.me/*",
        "https://v2.shlib.life/*",
        "https://ranobelib.me/*",
        "https://remanga.org/*",
        "https://реманга.орг/*",
        "https://xn--80aaig9ahr.xn--c1avg/*",
        "https://newmanga.org/*",
        "https://readmanganato.com/*",
        "https://chapmanganato.com/*",
        "https://mangadex.org/*",
        "https://mangabuff.ru/*",
        "*://fanfox.net/*",
        "*://teletype.in/*",
        "*://telegra.ph/*",
        "*://senkuro.com/*",
        "*://ne.senkuro.com/*",
        "*://mangaplus.shueisha.co.jp/*"
      ],
      "js": [
        "src/scripts/content/content.js"
      ],
      "run_at": "document_end",
      "css": [
        "manga-downloader.css"
      ]
    },
    {
      "matches": [
        "*://3.grouple.co/*",
        "*://grouple.co/*"
      ],
      "js": [
        "src/scripts/grouple-content/grouple-content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "content_security_policy": "object-src 'self'; script-src 'self' 'wasm-unsafe-eval' blob:",
  "browser_specific_settings": {
    "gecko": {
      "id": "{ffd1c86f-3be0-43ab-a563-edd6718c32f0}"
    }
  }
}