Dropbox

Configuration
Set the  variable to the regular user name in

Below is an example showing how to do so using the text editor ed:

Next, add the Dropbox init script to the default runlevel:

Now as a regular user run the command line shown below:

Which will create these directories in the user's directory:



Launcher
To create a Dropbox launcher for Xfce,

Download an icon from https://www.dropbox.com/sh/y30u5e1hnnqmv22/AADAMMM-gFutPWsm_tDDAR8ka/png?dl=0 and copy it into the directory.

Here is a screenshot of the the launcher properties window:



KDE Plasma 5
KDE Plasma dropped support for legacy Xembed-based systray support. In order for the systray icon to appear Plasma needs to be built with legacy systray support. Please refer to the Plasma 5 page for details.

Systemd
For systemd users: enable it, passing a username as the instance identifier:

Be sure to replace  in the example above with an appropriate user name.

By default, service will not display a tray-icon because it does not know which display to use. To repair this edit service:

Crash with nvidia-drivers
When trying to launch Dropbox on a system with nVidia proprietary drivers dropbox wouldn't start. It turns out that the problem is related to a bundled  library inside the Dropbox installation.

In order to fix this it is necessary to remove this library and let Dropbox use the system-provided version. This is already done by the ebuild, however Dropbox is automatically updating itself into so it is necessary to also remove the library from there.