LibreOffice is reading my Firefox keychain

Is it normal behavior for LibreOffice to read my Firefox certificate store and keychain database when opening docx,xlsx and pptx files ?
If normal, which feature requires that ?

This behavior was reported by AppArmor and I haven’t seen this in older versions.

I installed LibreOffice from Ubuntu’s repositories, it is shown as 6.0.3 .

Edit : Was able to replicate using 6.0.6 from official PPA for Ubuntu Bionic.