Image preview does not work with tmux popup

[playbahn]

Checklist

• I have read through the manual page (man fzf)
• I have searched through the existing issues
• For bug reports, I have checked if the bug is reproducible in the latest version of fzf

Output of fzf --version

0.65.0 (04c4269)

OS

• Linux
• macOS
• Windows
• Etc.

Shell

• bash
• zsh
• fish

Problem / Steps to reproduce

Set:

FZF_DEFAULT_OPTS="
    --multi
    --highlight-line
    --height            50%
    --tmux              80%
    --layout            reverse
    --border            sharp
    --info              inline-right
    --preview           '$HOME/oss/fzf/bin/fzf-preview.sh {}'
    --preview-border    line
    --tabstop           4"

Open fzf while inside tmux, select any image. (I'm using Konsole, it has builtin sixel support)

[junegunn]

Last time I checked, tmux popup didn't support images.

tmux/tmux#4329