Hi, Demm. The reason I use Vivaldi as a flatpak (and also emacs and LibreOffice) is that I have up to four distros running on my laptop at any given time, using this strategy:
- my main distro, which for some time has been Kaos
- a main distro competitor, right now the alpha of KDE Linux
- (KaOS has previously defeated KDE Neon, which was my main, and also OpenSUSE Tumbleweed)
- Linux Mint - my original distro, that I keep around for nostalgia
- a distro of interest, e.g. I tried PopOS with Cosmic here and found it too Gnome-like
The flatpaks are installed with --user, which puts them in my home directory, which is in its own partition. This means I don't have to reconfigure them for every different distro I might try - they just always work the way I want them too, For example, with Vivaldi, all my tabs, bookmarks, and history are there whichever distro I bring them up in.
This means that their .desktop files are also shared, so as far as adding 'password-store="kwallet6"' for Vivaldi, that might work for Niri/Noctalia, but I expect it would mess up distros like Mint, which use the gnome-keyring.
Except for Niri/Noctalia, Vivaldi has just used whatever secret service was available. (I just had to manually set the Chrome Safe Storage key to the same value as in the other distros.) I need to check if Niri/Noctalia might be running some non-KDE and non-gnome secret service.
I picked Vivaldi because (I think) it was the first with side tabs, and I jumped right on it. I don't have any reason to change now.