[Tracking Requested - why for this release]: on macOS, TEXTAREA and other "monospace" text uses non-Japanese font "PingFang SC Regular" on Japanese website, while it should be "Osaka-Mono". The similar issue had been there from Firefox 76, but there it was using Japanese font "Hiragino Kaku Gothic ProN W3". There are several differences in the glyph between "PingFang SC Regular" and "Hiragino Kaku Gothic ProN W3" (or "Osaka-Mono"), because of the difference between Japanese Kanji and Chinese Kanji, and some of them look completely different character. Using "Hiragino Kaku Gothic ProN W3" instead of "Osaka-Mono" wouldn't be much noticeable (given there wasn't bug report for 10 cycles), but using "PingFang SC Regular" is really noticeable and it looks like wrong character is shown.
Bug 1697666 Comment 24 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
[Tracking Requested - why for this release]: on macOS, TEXTAREA and other "monospace" text uses non-Japanese font "PingFang SC Regular" on Japanese website, while it should be "Osaka-Mono". The similar issue had been there from Firefox 76, but there it was using Japanese font "Hiragino Kaku Gothic ProN W3". There are several differences in the glyph between "PingFang SC Regular" and "Hiragino Kaku Gothic ProN W3" (or "Osaka-Mono"), because of the difference between Japanese Kanji and Chinese Kanji, and some of them look completely different character. Using "Hiragino Kaku Gothic ProN W3" instead of "Osaka-Mono" wouldn't be much noticeable (given there wasn't bug report for 10 cycles), but using "PingFang SC Regular" is really noticeable and it looks like wrong character is shown, or inserted to text area.