Debian stretch with chromium 55.0.2883.75-1 (and only chromium) pulled in from unstable. With a brand new profile (i.e., by deleting .cache/chromium and .config/chromium and starting Chromium) Chromium aw-snaps on gfycat.com with very high probability. I occasionally also see gmail aw-snap, but it's not consistent. When an aw-snap occurs, it does not seem to affect other tabs.
Stack trace: libpng warning: iCCP: known incorrect sRGB profile Received signal 11 SEGV_MAPERR fffffffd503afed7 #0 0x55f8a1a8d77e <unknown> #1 0x55f8a1a8db39 <unknown> #2 0x7fca07207100 <unknown> #3 0x55f8a025af21 <unknown> #4 0x55f8a0260ffa <unknown> #5 0x55f8a02610bb <unknown> #6 0x55f8a5c0f612 <unknown> #7 0x55f8a12cf952 <unknown> #8 0x55f8a1ae7495 <unknown> #9 0x55f8a1b13c21 <unknown> #10 0x55f8a1aae629 <unknown> #11 0x55f8a1aafd9d <unknown> #12 0x55f8a1ab0240 <unknown> #13 0x55f8a1ab0e99 <unknown> #14 0x55f8a1ace66a <unknown> #15 0x55f8a1aeb296 <unknown> #16 0x55f8a1ae7322 <unknown> #17 0x7fca071fd464 start_thread #18 0x7fc9fc6229df clone r8: 0000000000000000 r9: fffffffd503afecf r10: ffffe9c46ecdadef r11: 0011bb10e749bd95 r12: ffffffff00000000 r13: 00007fc9e5cb9548 r14: 00007fc9e5cb9540 r15: ffffe9c46ecdadef di: 000016393e5b0f70 si: 0000000000000013 bp: 0000000000000006 bx: fffffffd503afecf dx: fffffffd503afecf ax: fffffffd503afecf cx: 000016393ef75fa0 sp: 00007fc9e5cb94a0 ip: 000055f8a025af21 efl: 0000000000010286 cgf: 002b000000000033 erf: 0000000000000005 trp: 000000000000000e msk: 0000000000000000 cr2: fffffffd503afed7 [end of stack trace]