Firefox Save Image as.. not work
Note that this be an issue with "xdg-desktop-portal" and may have to install some packages like xdg-desktop-portal and xdg-desktop-portal-gtk Whether to use gtk portal for the file picker.
(true for flatpak or GTK_USE_PORTAL=1, false otherwise)
Step 1: go to address bar and tape: about:config
Step 2: find: widget.use-xdg-desktop-portal.file-picker
Step 3: set => 0
0:never
1:always
2:auto
Save Image as.. is working!
