this bug prevents icecat from accessing many websites (any which guard traffic via cloudflare, for example) - gitlab is perhaps the most popular example - it was a long-standing bug in iceweasel also; but i eventually identified and solved the problem; and i made a patch for gnuzila also
https://lists.gnu.org/archive/html/bug-gnuzilla/2021-05/msg00005.html please consider applying both this patch, and the one i sent a few weeks ago - icecat has had both of these bugs for years https://lists.gnu.org/archive/html/gnuzilla-dev/2022-09/msg00000.html
