bluesky-redirect.user.js

// ==UserScript==
// @name         BSky Redirect
// @namespace    http://tampermonkey.net/
// @version      2026-03-07
// @description  Redirect you to the best version available from bluesky
// @author       You
// @match        https://cdn.bsky.app/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=bsky.app
// @grant        none
// @run-at       document-start
// ==/UserScript==

(async function () {
  'use strict';

    let url = window.location.pathname.split("/")

    if (url.length < 6) return

    let did = url[4]
    let cid = url[5].includes("@") ? url[5].slice(0, url[5].lastIndexOf("@")) : url[5]


    if (did && cid) {
        console.log(`https://bsky.social/xrpc/com.atproto.sync.getBlob?did=${did}&cid=${cid}`)
        window.location.href = `https://bsky.social/xrpc/com.atproto.sync.getBlob?did=${did}&cid=${cid}`
    }
})();

There's an indexing issue in line 20: if the cid string does not contain @, it will truncate the cid. Consider replacing with these two lines:

  const cid_at_idx = url[5].lastIndexOf("@");
  let cid = cid_at_idx === -1 ? url[5] : url[5].slice(0, cid_at_idx);