Some box drawing characters aren't drawn straight in italic

[YaLTeR]

┏━━━━━━━┯━━━━━━━┳━━━━━━━┯━━━━━━━┓
┃       │       ┃       │       ┃
┃       │       ┃       │       ┃
┃       ╵       ┃       ╵       ┃
┠────── 1 ──────╂────── 2 ──────┨
┃       ╷       ┃       ╷       ┃
┃       │       ┃       │       ┃
┃       │       ╹       │       ┃
┣━━━━━━━┿━━━━━━ 0 ━━━━━━┿━━━━━━━┫
┃       │       ╻       │       ┃
┃       │       ┃       │       ┃
┃       ╵       ┃       ╵       ┃
┠────── 3 ──────╂────── 4 ──────┨
┃       ╷       ┃       ╷       ┃
┃       │       ┃       │       ┃
┃       │       ┃       │       ┃
┗━━━━━━━┷━━━━━━━┻━━━━━━━┷━━━━━━━┛

• Firefox Nightly:

  

• LibreOffice Writer:

  

[tonsky]

Fira Code doesn’t have italics. It’s your browser doing that