Given how often Tezfiles patches vulnerabilities, here’s how you can always find a working solution:
Assuming you found a tezfiles_downloader_v3.2_UPD.crx file or a userscript:
Tezfiles free tier offers painfully slow speeds (often <100 KB/s) and forces long wait times between downloads. A downloader tool can sometimes accelerate free downloads by reconnecting or using multiple threads.