Following tests fails in the annocheck:

Hardened: /usr/lib64/thunderbird/libmozavcodec.so: FAIL: dynamic-tags test because the BTI_PLT flag is missing from the dynamic tags 
Hardened: /usr/lib64/thunderbird/libmozavcodec.so: info: For more information visit: https://sourceware.org/annobin/annobin.html/Test-dynamic-tags.html

Hardened: /usr/lib64/thunderbird/libmozavcodec.so: FAIL: property-note test because properly formatted .note.gnu.property not found (it is needed for branch protection support) 
Hardened: /usr/lib64/thunderbird/libmozavcodec.so: info: For more information visit: https://sourceware.org/annobin/annobin.html/Test-property-note.html

Hardened: /usr/lib64/thunderbird/libgkcodecs.so: FAIL: cf-protection test because no .note.gnu.property section = no control flow information 
Hardened: /usr/lib64/thunderbird/libgkcodecs.so: info: For more information visit: https://sourceware.org/annobin/annobin.html/Test-cf-protection.html

Hardened: /usr/lib64/thunderbird/libmozavcodec.so: FAIL: property-note test because the IBT property is not enabled 
Hardened: /usr/lib64/thunderbird/libmozavcodec.so: info: For more information visit: https://sourceware.org/annobin/annobin.html/Test-property-note.html