dstiles - 7:49 pm on Oct 8, 2011 (gmt 0)
Won't Forefox work on your machine? Works on all I've seen so far. A secondary advantage when building sites is that Firefox has better compatibility than many browsers and a high percentage of visitors run it.
I use Ubuntu Lucid. Despite Firefox now being up to V6 or V7 on Windows I'm still on V3.6.23 here so Ubuntu/Canonical would appear to be some way behind, but it's still better than anything else I can run.