FZF_TMUX_OPTS routed the widgets through the deprecated fzf-tmux
wrapper, which doesn't parse --popup= and silently dropped the popup.
fzf 0.74 opens the popup itself via --tmux.

Assisted-by: Claude Opus 4.8 via Claude Code

diff --git a/.zshrc b/.zshrc
index 37ac90be..3fbbe710 100644
--- a/.zshrc
+++ b/.zshrc
@@ -133,8 +133,7 @@ if (( $+commands[fzf] )); then
 
   skip_dirs=.direnv,.git,.jj,node_modules,target
 
-  export FZF_DEFAULT_OPTS="--height=40% --layout=reverse"
-  export FZF_TMUX_OPTS="--popup=80%,60%"
+  export FZF_DEFAULT_OPTS="--height=40% --layout=reverse --tmux center,80%,60%"
   export FZF_DEFAULT_COMMAND="fd --type f --strip-cwd-prefix --hidden --follow --exclude .git"
 
   # not sure why FZF_DEFAULT_COMMAND isn't being used here?