If Windows Pro version, try testing in Windows Sandbox (VM) to see if you have the same issue. https://www.howtogeek.com/399290/how-to-use-windows-10s-new-sandbox-to-safely-test-apps/

Does it still happen with Bitdefender disabled? This may require rebooting into Windows Safe Mode (networking enabled). You could also try disabling it in [https://support.mozilla.org/en-US/kb/identify-problems-third-party-modules-firefox-windows about:third-party].

Nearly all of the crash reports submitted for this crash signature were submitted today ([https://crash-stats.mozilla.org/signature/?product=Firefox&signature=IPC%3A%3AChannel%3A%3AChannelImpl%3A%3ASetOtherPid&date=%3E%3D2024-04-12T16%3A11%3A00.000Z&date=%3C2024-04-26T16%3A11%3A00.000Z&_columns=date&_columns=product&_columns=version&_columns=build_id&_columns=platform&_columns=reason&_columns=address&_columns=install_time&_columns=startup_crash&_sort=-date&page=1#reports Reports]), so there doesn't seem to be much historical information to go on. Is there any pattern to which sites/pages/content may be associated with this problem? Or does it seem to occur at a certain time of the hour or after a certain duration of browsing? Or is it more random?