URL: https://replayweb.page

Browser / Version: Firefox 127.0
Operating System: Windows 10
Tested Another Browser: Yes Chrome

Problem type: Something else
Description: https://replayweb.page - slow performance for import in Firefox
Steps to Reproduce:
https://replayweb.page imports .warc files very slowly in Firefox (2 pages per iteration) while Chrome imports 300-500 per iteration.

Steps to reproduce:

1. Go to https://archive.org/download/warc_quotes_burntelectrons_org_20170701
2. Download quotes.burntelectrons.org-2017-07-01-d2494c48-00000.warc.gz (1.2GB)
3. Unpack it, e.g. with 7-Zip.
4. Load https://replayweb.page
5. Click "Choose File".
6. Select the unpacked .warc file.
7. Click "Load".

Expected: fast import
Actual: slow import

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