Firefox crashes when browsing longly on linkedin

hello

okay, this is a bug regarding firefox under LMDE5

when browsing a certain time on linkedin, the browser crashes.

I dont know if Im at the right place to write it, in a way I dont want to get pingponged between the different bugreports (ubuntu, debian, ff)

so in a first way, how could I get extracted the logs of firefox?
that crash happens with default FF in a fresh LMDE5 install, but also with others versions of FF.
how could I solve it?

thank you

Look at about:crashes. If you have unsubmitted crashes submit them. Hopefully you have crashes related to this problem – add them to the bug report. You can also look at the Bugzilla tab of the crash report to see if there are other bugs opened for those crashes.

unfortunately, it does not appears in it.

I opened a terminal
I started firefox from it
after browsing few hours, firefox crashed without any sign, window nothng, like if it was never opened

here is the log from terminal:

firefox
[GFX1-]: Unrecognized feature VIDEO_OVERLAY
[Child 26136, MediaDecoderStateMachine #1] WARNING: Decoder=7fdccc58e600 state=DECODING_METADATA Decode metadata failed, shutting down decoder: file /builds/worker/checkouts/gecko/dom/media/MediaDecoderStateMachine.cpp:367
[Child 26136, MediaDecoderStateMachine #1] WARNING: Decoder=7fdccc58e600 Decode error: NS_ERROR_DOM_MEDIA_METADATA_ERR (0x806e0006) - static MP4Metadata::ResultAndByteBuffer mozilla::MP4Metadata::Metadata(mozilla::ByteStream *): Cannot parse metadata: file /builds/worker/checkouts/gecko/dom/media/MediaDecoderStateMachine.cpp:3568
[Child 32233, MediaDecoderStateMachine #1] WARNING: Decoder=7f95220f4400 state=DECODING_METADATA Decode metadata failed, shutting down decoder: file /builds/worker/checkouts/gecko/dom/media/MediaDecoderStateMachine.cpp:367
[Child 32233, MediaDecoderStateMachine #1] WARNING: Decoder=7f95220f4400 Decode error: NS_ERROR_DOM_MEDIA_METADATA_ERR (0x806e0006) - static MP4Metadata::ResultAndByteBuffer mozilla::MP4Metadata::Metadata(mozilla::ByteStream *): Cannot parse metadata: file /builds/worker/checkouts/gecko/dom/media/MediaDecoderStateMachine.cpp:3568

###!!! [Child][PContentChild] Error: Send(msgname=PContent::Msg_AsyncMessage) Channel closing: too late to send/recv, messages will be lost

###!!! [Child][PContentChild] Error: RunMessage(msgname=PHttpChannel::Msg_DeleteSelf) Channel closing: too late to send/recv, messages will be lost

###!!! [Child][PContentChild] Error: RunMessage(msgname=PHttpChannel::Msg_DeleteSelf) Channel closing: too late to send/recv, messages will be lost

###!!! [Child][PContentChild] Error: RunMessage(msgname=PHttpChannel::Msg_DeleteSelf) Channel closing: too late to send/recv, messages will be lost

###!!! [Child][PContentChild] Error: RunMessage(msgname=PHttpChannel::Msg_DeleteSelf) Channel closing: too late to send/recv, messages will be lost

###!!! [Child][PContentChild] Error: Send(msgname=PContent::Msg_AsyncMessage) Channel closing: too late to send/recv, messages will be lost

[Child 84771, MediaDecoderStateMachine #1] WARNING: Decoder=7ff466191400 state=DECODING_METADATA Decode metadata failed, shutting down decoder: file /builds/worker/checkouts/gecko/dom/media/MediaDecoderStateMachine.cpp:367
[Child 84771, MediaDecoderStateMachine #1] WARNING: Decoder=7ff466191400 Decode error: NS_ERROR_DOM_MEDIA_METADATA_ERR (0x806e0006) - static MP4Metadata::ResultAndByteBuffer mozilla::MP4Metadata::Metadata(mozilla::ByteStream *): Cannot parse metadata: file /builds/worker/checkouts/gecko/dom/media/MediaDecoderStateMachine.cpp:3568

what should I do to get a much more verbosed log?

thank you