qBittorrent scrollbars not being styled in Firefox

[drphero]

Describe the bug The scrollbars for qBittorrent are not getting styled in Firefox. They work fine in Chrome.

Theme Install Method

• Webserver subfilter Config

Application Info

• qBittorrent 4.3.9

To Reproduce Steps to reproduce the behavior:

1. Add custom HTTP headers on the Web UI section

content-security-policy: default-src 'self'; style-src 'self' 'unsafe-inline' theme-park.dev raw.githubusercontent.com use.fontawesome.com; img-src 'self' theme-park.dev raw.githubusercontent.com data:; script-src 'self' 'unsafe-inline'; object-src 'none'; form-action 'self'; frame-ancestors 'self'; font-src use.fontawesome.com;

2. Add the following to nginx qBittorrent conf

proxy_set_header Accept-Encoding "";
sub_filter
'</body>'
'<link rel="stylesheet" type="text/css" href="https://theme-park.dev/css/base/qbittorrent/space-gray.css">
</body>';
sub_filter_once on;

3. Restart nginx & refresh qBittorrent

Expected behavior The space-gray theme will be applied to qBittorrent, include scrollbars.

Screenshots

Desktop

• OS
  • Client: macOS 14.1
  • Server: Debian GNU/Linux 10
• Browser: Firefox
• Version: 119.0

Additional context The space-gray theme scrollbars work fine for Sonarr. The Stylus method has the same problem. Removing the headers via nginx instead of adding the custom HTTP headers in the WebUI settings has the same problem.