True. And I can confirm it's not listed in my plugins at all. (There's
just Cisco OpenH264 and Widevine). Only potentially-relevant extension
is Disable HTML5 Autoplay, which if anything should *stop* any video
being played before it gets to the software that does it.
Only other thing that seems odd, is the mimetime mapping Firefox has for
MP3 audio (in prefs) *defaults* to Videos, but in my case it's set to
"Use env"... but I wouldn't have set that (is first time I've seen it).
It wouldn't be surprising if "Use env" gets it to be sent to Videos too,
by a system default? So maybe it was an MP3 file. But not one I
knowingly clicked on.
... but finding some MP3 files and playing them in the browser
deliberately is working fine.
True. And I can confirm it's not listed in my plugins at all. (There's relevant extension
just Cisco OpenH264 and Widevine). Only potentially-
is Disable HTML5 Autoplay, which if anything should *stop* any video
being played before it gets to the software that does it.
Only other thing that seems odd, is the mimetime mapping Firefox has for
MP3 audio (in prefs) *defaults* to Videos, but in my case it's set to
"Use env"... but I wouldn't have set that (is first time I've seen it).
It wouldn't be surprising if "Use env" gets it to be sent to Videos too,
by a system default? So maybe it was an MP3 file. But not one I
knowingly clicked on.
... but finding some MP3 files and playing them in the browser
deliberately is working fine.
So no, I'm sorry, I'm mystified.