Bug reports and feature requests need to be made at
http://bugs.netsurf-browser.org (there is a severity of "feature" for requests) - the Sourceforge bugs page hasn't been used for years, and the fact it doesn't work properly on NetSurf was one of the reasons for moving it off
. I've not known it to crash on that page, but then I've not had cause to visit a dead bug database!
It shouldn't be unstable. It would be useful to know when this started happening, try the previous release version and see if that has the same problem, if not try and narrow it down to a CI build number.
There is a known issue that if you haven't used the install script, it may crash when visiting certain websites. However it should work OK on the next launch.
I don't know of any "crash on exit" bugs that are still occurring.