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Raspberry Pi B+ v2 latest OS and upgrades

Trying to install Firefox. sudo apt-get install firefox appears to work with Firefox appearing in applications list. But click on it, get busy indicator for ~10 sec, then nothing. Rpi reverts to normal idle screen awaiting input.

If I try to install again get message that already have latest verson 91.10.0esr-1-deb11u1+rpi

Help please