Some institutions choose to hide the launch button thereby requiring their users to use keyboard shortcuts to launch the tools. If this is the case at your institutions, please teach your users how to use these keyboard shortcuts.
To unhide the Rich Content Editor Toolbar launch button using keyboard shortcuts you may either use:
"Alt-Shift-D" (PC) / "Option-Shift-D" (Mac)
The first option is the original keyboard shortcut but, due to a Firefox update, it occasionally adds a character at the beginning of the page title field on the Canvas page.