Firefox spewing errors and beeping the terminal

[Kevin Oberman]

Today, for the first time since updating firefox to deal with the Opus
update, I am seeing a huge number of error messages. Worse, every time I
type a <SPC>, I get a <BEL> which is REALLY annoying!!

Here are a few of the errors I cut and pasted from the console. The final
ASSERTION seems to be ringing the bell.
ASSERTION:: Too many arguments.RNING: refusing to set request header: file
/usr/ports/www/firefox/work/mozilla-release/content/base/src/nsXMLHttpRequest.cpp,
line 2991
[1412] WARNING: NS_ENSURE_TRUE(!(aRv.Failed())) failed: file
/usr/ports/www/firefox/work/mozilla-release/content/base/src/nsXMLHttpRequest.cpp,
line 3638
[1412] WARNING: NS_ENSURE_TRUE(mHostRecord->flags &
nsHostResolver::RES_CANON_NAME) failed: file
/usr/ports/www/firefox/work/mozilla-release/netwerk/dns/nsDNSService2.cpp,
line 84
[1412] WARNING: NS_ENSURE_TRUE(mHostRecord->flags &
nsHostResolver::RES_CANON_NAME) failed: file
/usr/ports/www/firefox/work/mozilla-release/netwerk/dns/nsDNSService2.cpp,
line 84
++DOCSHELL 0x5a39dc00 == 32 [pid = 1412] [id = 33]
++DOMWINDOW == 65 (0x60d6da38) [pid = 1412] [serial = 91] [outer = 0x0]
[1412] WARNING: Subdocument container has no frame: file
/usr/ports/www/firefox/work/mozilla-release/layout/base/nsDocumentViewer.cpp,
line 2416
++DOMWINDOW == 66 (0x60d70438) [pid = 1412] [serial = 92] [outer =
0x60d6da38]
[1412] WARNING: NS_ENSURE_SUCCESS(rv, nullptr) failed with result
0x80570027: file
/usr/ports/www/firefox/work/mozilla-release/js/xpconnect/wrappers/WrapperFactory.cpp,
line 286
[1412] ###!!! ASSERTION: point.x should not be outside of rect r: 'aR->x <=
point.x && point.x <= aR->XMost()', file
/usr/ports/www/firefox/work/mozilla-release/content/base/src/nsRange.cpp,
line 2748

Any idea what is going on here?
-- 
R. Kevin Oberman, Network Engineer, Retired
E-mail: rkoberman at gmail.com