Edge actually works kind of well with much less stutter and no pausing like Chrome.
Otherwise I've tried out X-Iron for some two months now. No lag or stuttering at all, and no crash so far either.
sourceforge.net/projects/winpenpack/files/X-Iron/releases/
Version: X-Iron_35.0.1900.0_rev13
Now, this is an old build of chromium, so I really suggest not using it for anything else.
Clip using it running one of the maps from previous Gold Rush:
youtube.com/watch?v=2olOfiUOTm0