Force Chromium to use Dolphin File Manager to save a download

I use KDE Plasma 5.19.5 (Kubuntu 20.10) Chromium Version 89.0.4389.114 (Official Build) snap (64-bit) Dolphin is my default File manager and I customised its favourites and use single click to open files and directories.

The issue I have (and I spent many hours looking for an answer) is that when I save anything from Chromium, it saves using a "Save File" window that forces me to double click, shows files and folders in mixed up in alphabetical order and no favourites.

I have no idea as to what File Manager Chromium insists on using and I would like to force it to use Dolphin.

Can anyone please show me or point me to a solution?

EDIT: @Archisman I followed your instructions by here and it all worked well, however even though the first instruction was to uninstall the existing version of Chromium, I now have two Chromiums one Snap and one Deb. The Deb one invokes Dolphin when saving or printing to PDF, so it solved my problem, however I now would like to remove the Snap version without damaging the Dep ones.... Could you please tell me how to do it safely?

1 Answer

Install plasma-browser-integration

sudo apt install plasma-browser-integration

Then install the plasma integration extension, and restart Chromium.

Image: Qt file manager widget in action in Kubuntu 20.04, with all bookmarked folders.

I have verified that this answer works for apt version of chromium and also firefox (the same plasma-browser-integration package and the same Plasma Integration add on). OP reported that it does not work with the snap version of Chromium, which Ubuntu ships. One can either can install chromium without snap instead, or open a bug at Launchpad to let the Ubuntu's chromium packaging team know about this.

To remove the snap version of chromium, enter the command sudo snap remove chromium.