The issue is still reproducible on Ubuntu 22.04 x64 with Old Italic, Old Turkic, Runic fonts installed on the machine. Tofu boxes are displayed in PBM, but not on normal window, when accessing the test pages from comment 0.
Bug 1830522 Comment 2 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
The issue is still reproducible on Ubuntu 22.04 x64 with Old Italic, Old Turkic, Runic fonts installed on the machine. Tofu boxes are displayed in PBM, but not on normal window, when accessing the test pages from comment 0. The issue is no longer reproducible on macOS 13.