All, Anyone running Firefox from the openSUSE builds, can you check with Ctrl+O and see if a file-open dialog appears? The problem is there was a change in settings in Firefox: widget.use-xdg-desktop-portal.file-picker=1 Where: 0: never 1: always 2: auto This was apparently done because Plasma will only use native file dialogs if the widget.use-xdg-desktop-portal.file-picker is set to 1. All of this "portal" crapola is courtesy of flatpak sandbox issue. However, for anyone running a desktop that doesn't have xdg-desktop-portal installed, your file-open chooser is now gone. No xdg-desktop-portal, no file-open dialog. Apparently when this use was set to "always", there wasn't also a corresponding dependency added to Firefox/Thrunderbird. So if you don't have the portal packages installed, no file-open anymore. If others have broken Firefox I'll write it up. (this also breaks vscode/vscodiaum, etc..) From the Flatpak documentation: Portals are the framework for securely accessing resources from outside an application sandbox. They provide a range of common features to applications, including: determining network status, opening a file with a file chooser, opening URIs, taking screenshots and screencasts ... They just overlooked the fact that people on Linux actually use software that isn't running in a damn container... Who would have thunk? Let me know if that caught you too. I'm happy to author the bug. -- David C. Rankin, J.D.,P.E.