I don’t know if this is a Plasma issue or a general one, but before Plasma 5.25 I could change a name of a file I wanted to download, for instance, an invoice in the window where it asks in which file it should go to.
Since Plasma 5.25, I can’t do that anymore and I have to do that after download. This might seem trivial, but if you are downloading a bunch of invoices, named customer-service-invoice the system will ask if you want to overwrite the existing file, in case you forget to change the name before downloading the new one.
Firefox uses generic GTK file dialog i would think that’s most likely the problem part, unless you have changed it to qt file dialog deliberately by using environment variables…
I’ve found out what was causing it (for me at least @Bryanpwo ). I’d set theGTK_USE_PORTAL=1 environment variable. Removing this has brought back the download/rename popup
It turns out that I didn’t have xdg-desktop-portal installed (only xdg-desktop-portal-kde). Installing that, and then changing the two widget.use-xdg-desktop-portal settings in about:config recommended here https://wiki.archlinux.org/title/Firefox#KDE_integration has restored the Save As functionality and uses the KDE dialogs
This has been bugging me for a while, so I’m glad I’ve fixed it