gnome-shell-extension-appindicator from home:Ximi1970:Mozilla:Add-ons:Staging:Test3 project

For Arch Linux, edit /etc/pacman.conf and add the following (note that the order of repositories in pacman.conf is important, since pacman always downloads the first found package):

[home_Ximi1970_Mozilla_Add-ons_Staging_Test3_Arch]
Server = https://download.opensuse.org/repositories/home:/Ximi1970:/Mozilla:/Add-ons:/Staging:/Test3/Arch/$arch

Then run the following as root

key=$(curl -fsSL https://download.opensuse.org/repositories/home:Ximi1970:Mozilla:Add-ons:Staging:Test3/Arch/$(uname -m)/home_Ximi1970_Mozilla_Add-ons_Staging_Test3_Arch.key)
fingerprint=$(gpg --quiet --with-colons --import-options show-only --import --fingerprint <<< "${key}" | awk -F: '$1 == "fpr" { print $10 }')

pacman-key --init
pacman-key --add - <<< "${key}"
pacman-key --lsign-key "${fingerprint}"

pacman -Sy home_Ximi1970_Mozilla_Add-ons_Staging_Test3_Arch/gnome-shell-extension-appindicator

For openSUSE Tumbleweed run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:Ximi1970:Mozilla:Add-ons:Staging:Test3/openSUSE_Tumbleweed/home:Ximi1970:Mozilla:Add-ons:Staging:Test3.repo
zypper refresh
zypper install gnome-shell-extension-appindicator