Created attachment 193772 [details]
Using either Firefox or Chrome access following URL will take system down:
Firefox typically hangs the system forever, and Chrome crashes the system immediately.
Browser specific issues:
After crash, system reboots and cleans FS up (done by fsck) , firefox can be started without issue, but starting Chrome will continue to crash the system and generate coredump (crash log is attached); and somehow, a few Chrome crashes can erase Firefox's history and settings (not intentionally to repeat this issue because chrome crash damages the file system badly).
As a point of reference that link works for me on -current.
What graphics card/hardware do you have?