For your toolbar separator needs.
What is divider?
divider is a Firefox add-on that lets you conveniently organize your toolbar buttons in two groups with a customizable separator. It works well in the overflow menu and allows you to divide your toolbar for better organization. The size and contents of the divider label can be customized to fit your preferences. Try divider to enhance your toolbar management experience.
Divide your toolbar with a divider (also known as separator). Also works well in the overflow menu.
Lets you conveniently organize your toolbar buttons in two groups. Supports one divider.
The size and contents of the divider label can be customized to fit your overflow menu. Changing the size also rotates the icon of the divider to be horizontal.
divider is safe to use. It does not request any sensitive permissions.
divider has earned a fairly good reputation and likely can be trusted.