I use Arch Linux as well as many other Linux flavors. Often on Arch with Gnome desktop I had trouble getting the Dropbox drop down menu to look and perform properly. I searched the Internet but really found nothing addressing my problem. I actually gave up on it for a few months. While trying to correct another problem with the app indicator panel I installed libappindicator-gtk3. It solved the other problem I was working on but I got an added bonus in that the Dropbox drop down menu suddenly started working perfectly as it does on Linux Mint Cinnamon, Debian Gnome and MX Linux Xfce. So just a tip if the Dropbox drop down menu is not performing properly on Arch Linux Gnome, try installing libappindicator-gtk3 from the Arch repositories. It is in the Arch official extra repository. I think it's possible that this solution could also help on any Arch based distro such as Manjaro, EndeavourOS, etc. if the Dropbox drop down menu doesn't look or perform correctly. I also had the same problem on Fedora Gnome but I don't currently have a free test partition to try this with Fedora.
