Welcome @nihaoma! Thanks for reporting this issue. In order to look into this, we’ll need more information about your desktop environment.
- What theme are you using? If you made the theme, please attack the theme source.
- The name and version number of your operating system.
- The name and version number of your Firefox installation.
- Does the ☰ menu in the top right of the Firefox window indicate that you need to restart to apply an update?
- Are you using a custom
user.cssfile?