Is this CISCO OpenH264 plugin a virus?
For many years, My firefox locks when I have many tabs.
I always auto-update firefox 64bit windows standard korean version.
I today found locking is because of CISCO OpenH264 plugin.
It is updated from CISCO server, not from firefox server.
SHA-256 is "1ED7877024BE63A049DA98733FD282C16BD620530A4FB580DACEC3A78ACE914E"