Note: other people on the internet have reported the same issue:
On AskUbuntu: https://askubuntu.com/questions/1338970/copy-paste-from-firefox-88-0-1-not-working-properly-on-ubuntu-21-04-hirsute-hip
On Reddit: https://www.reddit.com/r/firefox/comments/myhfc5/copy_pasting_occasionally_breaking_on_ubuntu_2104/
Note: other people on the internet have reported the same issue:
On AskUbuntu: https:/ /askubuntu. com/questions/ 1338970/ copy-paste- from-firefox- 88-0-1- not-working- properly- on-ubuntu- 21-04-hirsute- hip
On Reddit: https:/ /www.reddit. com/r/firefox/ comments/ myhfc5/ copy_pasting_ occasionally_ breaking_ on_ubuntu_ 2104/