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Terminal font rendering bug in Firefox and Chrome.

See original GitHub issue

OS/Web Information

Web Browser: Firefox, Google Chrome, Microsoft Edge
Local OS: Linux, Windows 10
Remote OS: Amazon Linux 2
Remote Architecture: x86_64
code-server --version: 3.11.1 c680aae973d83583e4a73dc0c422f44021f0140e

Steps to Reproduce

open code-server tab in Firefox
open terminal
type _______

Expected

The underscore characters are visible.

Actual

The underscore characters are not visible, leaving what appears to be blank spaces. In Chrome based browsers, adjusting the terminal’s line spacing to 1.1 makes the underscores visible, but this does not work in Firefox.

Logs

Console stdout/stderr:

[2021-08-30T20:58:55.509Z] info    - Not serving HTTPS
[2021-08-30T21:02:15.733Z] debug forking vs code...
[2021-08-30T21:02:16.096Z] debug setting up vs code...
[2021-08-30T21:02:16.099Z] debug vscode got message from code-server {"type":"init"}
[2021-08-30T21:02:18.976Z] debug vscode got message from code-server {"type":"socket"}
[2021-08-30T21:02:18.979Z] debug protocol Initiating handshake... {"token":"aae87521-0bbb-4f11-9aac-5b37061ad123"}
[2021-08-30T21:02:19.040Z] debug protocol Handshake completed {"token":"aae87521-0bbb-4f11-9aac-5b37061ad123"}
[2021-08-30T21:02:19.041Z] debug management Connecting... {"token":"aae87521-0bbb-4f11-9aac-5b37061ad123"}
[2021-08-30T21:02:19.042Z] debug vscode 1 active management connection(s)
[2021-08-30T21:02:20.647Z] debug vscode got message from code-server {"type":"socket"}
[2021-08-30T21:02:20.647Z] debug protocol Initiating handshake... {"token":"1e6492e6-71b6-4fda-bf1e-5a1e11924ca3"}
[2021-08-30T21:02:20.884Z] debug got latest version {"latest":"3.11.1"}
[2021-08-30T21:02:20.884Z] debug comparing versions {"current":"3.11.1","latest":"3.11.1"}
[2021-08-30T21:02:20.919Z] debug protocol Handshake completed {"token":"1e6492e6-71b6-4fda-bf1e-5a1e11924ca3"}
[2021-08-30T21:02:20.920Z] debug exthost Connecting... {"token":"1e6492e6-71b6-4fda-bf1e-5a1e11924ca3"}
[2021-08-30T21:02:20.921Z] debug exthost Getting NLS configuration... {"token":"1e6492e6-71b6-4fda-bf1e-5a1e11924ca3"}
[2021-08-30T21:02:20.921Z] debug vscode 1 active exthost connection(s)
[2021-08-30T21:02:20.921Z] debug exthost Spawning extension host... {"token":"1e6492e6-71b6-4fda-bf1e-5a1e11924ca3"}
[2021-08-30T21:02:20.925Z] debug exthost Waiting for handshake... {"token":"1e6492e6-71b6-4fda-bf1e-5a1e11924ca3"}
[2021-08-30T21:02:21.328Z] debug exthost Handshake completed {"token":"1e6492e6-71b6-4fda-bf1e-5a1e11924ca3"}
[2021-08-30T21:02:21.328Z] debug exthost Sending socket {"token":"1e6492e6-71b6-4fda-bf1e-5a1e11924ca3"}
terminate called after throwing an instance of 'Napi::Error'
  what():  Inotify limit reached
IPC "File Watcher (nsfw)" crashed with exit code null and signal SIGABRT
  ERR [File Watcher (nsfw)] terminated unexpectedly and is restarted again...
  ERR [File Watcher (nsfw)] terminated unexpectedly and is restarted again...
terminate called after throwing an instance of 'Napi::Error'
  what():  Inotify limit reached
IPC "File Watcher (nsfw)" crashed with exit code null and signal SIGABRT
  ERR [File Watcher (nsfw)] terminated unexpectedly and is restarted again...
  ERR [File Watcher (nsfw)] terminated unexpectedly and is restarted again...
terminate called after throwing an instance of 'Napi::Error'
  what():  Inotify limit reached
IPC "File Watcher (nsfw)" crashed with exit code null and signal SIGABRT
  ERR [File Watcher (nsfw)] terminated unexpectedly and is restarted again...
  ERR [File Watcher (nsfw)] terminated unexpectedly and is restarted again...
terminate called after throwing an instance of 'Napi::Error'
  what():  Inotify limit reached
IPC "File Watcher (nsfw)" crashed with exit code null and signal SIGABRT
  ERR [File Watcher (nsfw)] terminated unexpectedly and is restarted again...
  ERR [File Watcher (nsfw)] terminated unexpectedly and is restarted again...
terminate called after throwing an instance of 'Napi::Error'
  what():  Inotify limit reached
IPC "File Watcher (nsfw)" crashed with exit code null and signal SIGABRT
  ERR [File Watcher (nsfw)] terminated unexpectedly and is restarted again...
  ERR [File Watcher (nsfw)] terminated unexpectedly and is restarted again...
terminate called after throwing an instance of 'Napi::Error'
  what():  Inotify limit reached
IPC "File Watcher (nsfw)" crashed with exit code null and signal SIGABRT
  ERR [File Watcher (nsfw)] terminated unexpectedly and is restarted again...
  ERR [File Watcher (nsfw)] terminated unexpectedly and is restarted again...
terminate called after throwing an instance of 'Napi::Error'
  what():  Inotify limit reached
IPC "File Watcher (nsfw)" crashed with exit code null and signal SIGABRT
  ERR [File Watcher (nsfw)] failed to start after retrying for some time, giving up. Please report this as a bug report!
  ERR [File Watcher (nsfw)] failed to start after retrying for some time, giving up. Please report this as a bug report!
^C[2021-08-30T21:02:59.332Z] debug child:72071 disposing {"code":"SIGINT"}