How to add an Extension button to the Firefox toolbar

Mozilla Firefox supports an Extension button on the toolbar, but it must first be enabled. We explain how to do it and add the button.

How to disable browser extensions in Firefox - Quora

Toolbar Buttons :: Add-ons for Firefox

SEO Toolbar for Firefox: Free Firefox SEO Extension / Browser Plug In

Firefox: Customizing Firefox

Mozilla, let us remove the Extension Button from the toolbar! : r/firefox

If you don't see the 1Password icon in your browser's toolbar

Some extension add on icons do not appear in firefox toolbar.

How to add a simple vertical toolbar in Firefox - CNET

I removed an extension from my toolbar. How can I put it back?, Firefox Support Forum