No need to edit /etc/default/grub manually

Grub Editor allows you to customize grub with a graphical application(Not a text editor😉)

How does it work?

Unlike the grub customizer, grub editor performs the edits to etc/default/grub and then calls update-grub or grub-mkconfig to update /boot/grub/grub.cfg. It is much more safer than editing /boot/grub/grub.cfg directly as it cannot leave the system in an unbootable condition.

It currently uses pkexec to execute commands that require sudo permissions as i don't know how to use polkit to elavate permissions 😅.

Download

Arch linux and it's derivatives

It is in AUR as grub-editor.
You can use a package manager like pamac to install or you can execute the commands below

git clone https://aur.archlinux.org/grub-editor.git
cd grub-editor
makepkg -si

Ubuntu and it's derivatives

Download and install the deb file

fedora

We currently do not have a fedora release