For archiving bulk data, the official Python-based command-line tool is the safest alternative. It bypasses browser limitations entirely.
python3 ia_downloader.py download -i <ITEM_IDENTIFIER> -o <OUTPUT_FOLDER> -v internet archive html5 uploader 16 3 download verified
The ia command-line tool is the official interface to Archive.org. It is included with the internetarchive Python library. For archiving bulk data