Similar issues on Bullseye with Chromium 83.0.4103.116. On an x86_64 system.
Ensured all packages are up to date and did a fresh restart. Chromium is completely unstable and unusable, consistently crashes after a few minutes of use. Sometimes a crash log shows up, sometimes it all just goes poof. It would seem there was no actual testing done before shoving this version of Chromium into Debian testing. Example logging output Received signal 11 <unknown> 000000000000 #0 0x560d8f642c69 (/usr/lib/chromium/chromium+0x52b3c68) #1 0x560d8f5a1ef3 (/usr/lib/chromium/chromium+0x5212ef2) #2 0x560d8f6427f1 (/usr/lib/chromium/chromium+0x52b37f0) #3 0x7fdb6af9d110 (/usr/lib/x86_64-linux-gnu/libpthread-2.30.so+0x1410f) #4 0x560d8d49f080 (/usr/lib/chromium/chromium+0x311007f) #5 0x560d8d49f08c (/usr/lib/chromium/chromium+0x311008b) #6 0x560d8d49f08c (/usr/lib/chromium/chromium+0x311008b) #7 0x560d8dcfc0d8 (/usr/lib/chromium/chromium+0x396d0d7) #8 0x560d8dcfc17e (/usr/lib/chromium/chromium+0x396d17d) #9 0x560d8d351387 (/usr/lib/chromium/chromium+0x2fc2386) #10 0x560d8dcb53d9 (/usr/lib/chromium/chromium+0x39263d8) #11 0x560d8dcb561e (/usr/lib/chromium/chromium+0x392661d) #12 0x560d8dcff967 (/usr/lib/chromium/chromium+0x3970966) #13 0x560d8dd2b4c7 (/usr/lib/chromium/chromium+0x399c4c6) #14 0x560d8dd2b77e (/usr/lib/chromium/chromium+0x399c77d) #15 0x560d8dcfc13f (/usr/lib/chromium/chromium+0x396d13e) #16 0x560d8dcfc17e (/usr/lib/chromium/chromium+0x396d17d) #17 0x560d8d351387 (/usr/lib/chromium/chromium+0x2fc2386) #18 0x560d8d6147a3 (/usr/lib/chromium/chromium+0x32857a2) #19 0x560d8d9830bc (/usr/lib/chromium/chromium+0x35f40bb) #20 0x560d8f77445f (/usr/lib/chromium/chromium+0x53e545e) #21 0x560d8f77aa24 (/usr/lib/chromium/chromium+0x53eba23) #22 0x560d8f778b62 (/usr/lib/chromium/chromium+0x53e9b61) #23 0x560d8f77782d (/usr/lib/chromium/chromium+0x53e882c) #24 0x560d8f770213 (/usr/lib/chromium/chromium+0x53e1212) #25 0x560d8f78babb (/usr/lib/chromium/chromium+0x53fcaba) #26 0x560d8f78bde0 (/usr/lib/chromium/chromium+0x53fcddf) #27 0x560d8f78b370 (/usr/lib/chromium/chromium+0x53fc36f) #28 0x560d8d5fdc46 (/usr/lib/chromium/chromium+0x326ec45) #29 0x560d8d5fd76c (/usr/lib/chromium/chromium+0x326e76b) #30 0x560d8d5f9eed (/usr/lib/chromium/chromium+0x326aeec) #31 0x560d8d5f074b (/usr/lib/chromium/chromium+0x326174a) #32 0x560d8d5e3044 (/usr/lib/chromium/chromium+0x3254043) #33 0x560d8d5e2d75 (/usr/lib/chromium/chromium+0x3253d74) #34 0x560d8d601426 (/usr/lib/chromium/chromium+0x3272425) #35 0x560d8f6600e0 (/usr/lib/chromium/chromium+0x52d10df) #36 0x7fdb69d52b0f (/usr/lib/x86_64-linux-gnu/libevent-2.1.so.7.0.0+0x23b0e) #37 0x7fdb69d5324f event_base_loop #38 0x560d8f66038e (/usr/lib/chromium/chromium+0x52d138d) #39 0x560d8f6005d5 (/usr/lib/chromium/chromium+0x52715d4) #40 0x560d8f5d8670 (/usr/lib/chromium/chromium+0x524966f) #41 0x560d8d91e3b3 (/usr/lib/chromium/chromium+0x358f3b2) #42 0x560d8f6162a9 (/usr/lib/chromium/chromium+0x52872a8) #43 0x560d8f652c9e (/usr/lib/chromium/chromium+0x52c3c9d) #44 0x7fdb6af91f27 start_thread #45 0x7fdb6610031f clone r8: 00007fdb48000914 r9: 0000000000000007 r10: 0000000000004000 r11: 0000000000000000 r12: 0000560d94711ff0 r13: 00007fdb485e2450 r14: 00007fdb48405c70 r15: 0000000000000000 di: 00007fdb48405c70 si: 8948105789480877 bp: 00007fdb577fbd40 bx: 8948105789480877 dx: 00007fdb48000080 ax: 00007fdb48619938 cx: 0000000000000001 sp: 00007fdb577fbd20 ip: 0000560d8d49f080 efl: 0000000000010286 cgf: 002b000000000033 erf: 0000000000000000 trp: 000000000000000d msk: 0000000000000000 cr2: 0000000000000000 [end of stack trace] Calling _exit(1). Core file will not be generated.