Related concerns found in [Archlinux forum](https://bbs.archlinux.org/viewtopic.php?pid=1994387) and [Reddit r/Thunderbird](https://old.reddit.com/r/Thunderbird/comments/ppnb5g/thunderbird_91_significantly_slower/).
Related concerns found in [Archlinux forum](https:/ /bbs.archlinux. org/viewtopic. php?pid= 1994387) and [Reddit r/Thunderbird](https:/ /old.reddit. com/r/Thunderbi rd/comments/ ppnb5g/ thunderbird_ 91_significantl y_slower/).