The browser is a little limited in its javascript support (and hence rendering of a lot of modern sites) but it should not crash in general operation.
Why do animated gifs stutter and flicker on Win!
I'm really so tired of Chrome and it's two day compile times, this is great!
The win port uses windows 2000 compatible GDI calls and I imagine this is the cause for GIF flickering, SVG not rendering and truetype fonts not being used.
The core browser functionality does support javascript, however there are thousands of DOM bindings and our progress in implementing them all is slow.
Does it run well on Raspberry Pi?
Unfortunately the Mac OS X frontend became unmaintained some time ago and eventually stopped working altogether which resulted in its removal from the master branch and hence releases.
There was some activity by Sven earlier in the year ( http://source.netsurf-browser.org/netsurf.git/log/?h=svenw/c... ) but it was not ready to be included and I think he lost interest again.