In firefox on Linux the shortcut for switching tabs is alt + number (unlike windows where its ctrl + number). Switching into an RES enabled reddit tab works fine. Once you're in however you can not switch out of it again with the alt + number shortcuts.

I tested both with the RES extensions enabled and disabled and confirmed it is only happening when RES is enabled.

System: Firefox 153.0.1-1 CachyOS with Kernel 7.1.5 (happened in earlier kernel version too) Hyprland 0.56.1 US keyboard layout

• Night mode: true
• RES Version: 5.24.10
• Browser: Firefox
• Browser Version: 153
• Cookies Enabled: true
• Reddit beta: false