I can't reproduce, either (on MacOS 11.5.1 in my case; I'm glad Jonathan has macOS 12 available for testing & couldn't reproduce there). I wonder if maybe there was a temporary issue with the site (e.g. the variable-width font just failed to load perhaps)? That sort of thing could explain this. pepelopex, thanks for the bug report; if you can still reproduce this bug, please provide some more information about the exact Firefox & macOS versions you're using - thanks! Otherwise we can't really do anything here, given that we're not seeing the issue on our end. Screenshots may be helpful as well; they might hint about other possible explanations.
Bug 1721026 Comment 3 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
I can't reproduce, either (on MacOS 11.5.1 in my case; I'm glad Jonathan has macOS 12 available for testing & couldn't reproduce there). I wonder if maybe there was a temporary issue with the site when the reporter hit this issue? (e.g. the variable-width font just failed to load perhaps)? That sort of thing could explain this. pepelopex, thanks for the bug report; if you can still reproduce this bug, please provide some more information about the exact Firefox & macOS versions you're using - thanks! Otherwise we can't really do anything here, given that we're not seeing the issue on our end. Screenshots may be helpful as well; they might hint about other possible explanations.