We have a number of workstations running Debian 10 in our office and all have exhibited the same behavior after an upgrade to 83.0.4103.116-2 from buster-security.
100% CPU usage on all available cores for tabs and extensions even if there is no specific activity in them. I have no stack traces to offer, but can confirm that downgraded back to version 80 from stable gives us a usable browser again and I will happily supply whatever further information is required.
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