Examine source code of Upload to Danbooru

{
  "manifest_version": 3,
  "name": "Upload to Danbooru",
  "description": "Add a page action and a context menu option (for images) to upload to Danbooru.",
  "version": "3.4.2",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png",
    "256": "icons/icon256.png"
  },
  "page_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "19": "icons/icon19.png",
      "32": "icons/icon32.png",
      "38": "icons/icon38.png"
    },
    "default_title": "Upload to Danbooru",
    "show_matches": [
      "https://x.com/*/status/*",
      "https://twitter.com/*/status/*",
      "https://twitpic.com/*",
      "https://www.pixiv.net/artworks/*",
      "https://www.pixiv.net/en/artworks/*",
      "https://sketch.pixiv.net/items/*",
      "https://*.fanbox.cc/posts/*",
      "https://www.fanbox.cc/@*/posts/*",
      "https://booth.pm/*/items/*",
      "https://*.booth.pm/items/*",
      "https://fantia.jp/posts/*",
      "https://www.patreon.com/posts/*",
      "https://skeb.jp/@*/works/*",
      "https://enty.jp/posts/*",
      "https://enty.jp/*/posts/*",
      "https://seiga.nicovideo.jp/seiga/im*",
      "https://seiga.nicovideo.jp/watch/mg*",
      "https://*.deviantart.com/art/*",
      "https://www.deviantart.com/*/art/*",
      "https://sta.sh/*",
      "https://nijie.info/view.php?*id=*",
      "https://nijie.info/view_popup.php?*id=*",
      "https://sp.nijie.info/view.php?*id=*",
      "https://sp.nijie.info/view_popup.php?*id=*",
      "https://www.tinami.com/view/*",
      "https://www.tinami.com/view/tweet/card/*",
      "https://picdig.net/ema/projects/*",
      "https://poipiku.com/*/*.html",
      "https://pawoo.net/@*/*",
      "https://pawoo.net/web/statuses/*",
      "https://baraag.net/@*/*",
      "https://baraag.net/web/statuses/*",
      "https://bsky.app/profile/*/post/*",
      "https://www.bilibili.com/opus/*",
      "https://www.bilibili.com/read/*",
      "https://t.bilibili.com/*",
      "https://m.weibo.cn/detail/*",
      "https://m.weibo.cn/status/*",
      "https://weibo.com/*/*",
      "https://www.weibo.com/*/*",
      "https://tw.weibo.com/*/*",
      "https://misskey.io/notes/*",
      "https://misskey.art/notes/*",
      "https://misskey.design/notes/*",
      "https://mk.yopo.work/notes/*",
      "https://nijimiss.moe/notes/*",
      "https://oekakiskey.com/notes/*",
      "https://sushi.ski/notes/*",
      "https://voskey.icalo.net/notes/*",
      "https://www.hentai-foundry.com/pictures/user/*",
      "https://www.newgrounds.com/art/view/*",
      "https://www.furaffinity.net/view/*",
      "https://inkbunny.net/s/*",
      "https://inkbunny.net/submissionview.php?*id=*",
      "https://www.artstation.com/artwork/*",
      "https://*.artstation.com/projects/*",
      "https://foundation.app/@*/*/*",
      "https://opensea.io/assets/*/*/*",
      "https://anifty.jp/creations/*",
      "https://anifty.jp/*/creations/*",
      "https://xfolio.jp/portfolio/*/works/*",
      "https://xfolio.jp/*/portfolio/*/works/*",
      "https://ci-en.net/creator/*/article/*",
      "https://ci-en.dlsite.com/creator/*/article/*",
      "https://arca.live/b/*/*",
      "https://*.lofter.com/post/*",
      "https://*.lofter.com/front/post/*",
      "https://www.plurk.com/p/*",
      "https://*.fandom.com/wiki/Gallery?*file=*",
      "https://yande.re/post/show/*",
      "https://konachan.com/post/show/*",
      "https://boards.4channel.org/*/thread/*",
      "https://boards.4channel.org/*/res/*",
      "https://boards.4chan.org/*/thread/*",
      "https://boards.4chan.org/*/res/*",
      "https://gelbooru.com/index.php?*id=*",
      "https://safebooru.org/index.php?*id=*",
      "https://rule34.xxx/index.php?*id=*",
      "https://e621.net/posts/*",
      "https://www.instagram.com/p/*",
      "https://www.instagram.com/reel/*",
      "https://www.instagram.com/tv/*",
      "https://*.reddit.com/r/*/comments/*",
      "https://www.reddit.com/gallery/*",
      "https://www.reddit.com/media?url=*",
      "https://www.redditmedia.com/mediaembed/*",
      "https://vk.com/wall-*_*",
      "https://vk.com/photo-*_*",
      "https://vk.com/doc*_*",
      "https://m.vk.com/wall-*_*",
      "https://m.vk.com/photo-*_*",
      "https://medibang.com/picture/*/",
      "https://www.behance.net/gallery/*/*",
      "https://dotpict.net/works/*",
      "https://*.dotpict.net/works/*",
      "https://www.foriio.com/works/*",
      "https://galleria.emotionflow.com/*/*.html",
      "https://grafolio.ogq.me/project/detail/*",
      "https://huajia.163.com/main/works/*",
      "https://huajia.163.com/main/*/details/*",
      "https://itaku.ee/posts/*",
      "https://itaku.ee/images/*",
      "https://ko-fi.com/*?*viewimage=",
      "https://ko-fi.com/Gallery/*",
      "https://ko-fi.com/post/*",
      "https://ko-fi.com/album/*",
      "https://www.xiaohongshu.com/explore/*",
      "https://*.tumblr.com/post/*"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage"
  ],
  "commands": {
    "_execute_page_action": {
      "suggested_key": {
        "default": "Alt+Shift+D"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "upload-to-danbooru@zipfiled.info",
      "strict_min_version": "112.0"
    }
  }
}