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We have a web application where sometimes the request are broken on irregular basis and only using the Firefox browser the error that comes up is : SSL_ERROR_BAD_MAC_READ -12273 "SSL received a record with an incorrect Message Authentication Code." One customer claimes that they have this error about every 3 minutes but the others doesn't have this problem, but the other customers have this problem only a few times. Any idea how find out the source of that problem? I browsed a little through the Firefox code and found that if (NSS_SecureMemcmp(mac, pBuf, macLen) != 0) { /* MAC's didn't match... */ SSL_DBG(("%d: SSL[%d]: mac check failed, seq=%d", SSL_GETPID(), ss->fd, ss->sec.rcvSequence)); PRINT_BUF(1, (ss, "computed mac:", mac, macLen)); PRINT_BUF(1, (ss, "received mac:", pBuf, macLen)); PORT_SetError(SSL_ERROR_BAD_MAC_READ); rv = SECFailure; goto cleanup; } Obviously it is possible to see what was the received mac and what was the computed mac...anyone know where those logs are in FF or maybe I should enable some logging in FF? Where can I find the logs for this in Firefox?

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