Firefox keeps bugs unpatched for over 9 years

To give an example, the annoying "FTP server 215 ... is currently unsupported" message. This lingers from the way the old Mozilla (pre-Firefox) recognized FTP listings.
https://bugzilla.mozilla.org/show_bug.cgi?id=202730
Unsupported FTP server "xxxxxxx" after login and SYST command
https://bugzilla.mozilla.org/show_bug.cgi?id=277827
Unsupported FTP server "ITRON embedded printer OS"
This bug was reported in 2003, with various duplicates since then. They know what's causing the problem. Somebody sent in a patch and they still haven't fixed it. They're more concerned with bumping up the version numbers than a few simple bug fixes.

A reply from a developer from that bug report
There is no standard for ftp dir listings and Mozilla can't parse an unkown FTP
HAHAHAHAHAHA!!!
Ever heard of backtracking parsers you moran?
Back then Mozilla code was a joke.  It's sad to see that it didn't improve much quality-wise, and that the developers' attitude had not changed.