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.

>>39
- Theoretically it's open-source. Practically, forking FF and fixing things isn't easy. If it was as easy as gcc -o firefox firefox.c I would've done it a long time ago. The build environment is a nightmare and if http://www.ohloh.net/p/mozilla/analyses/latest/languages_summary is accurate then I need C, C++, Pascal, Perl AND Python, Modula-2 (WTF!), Visual Basic (WTF!) and a bunch of other shit. (Minirant: stop using obscure scripting languages to do trivial stuff in the build process. Write it in C/C++ or just use whatever scripting language the code started with -- Perl or Python is fine.)
- Why did they even change the UI in a retarded direction in the first place?