Firefox 109 comes with the new Extensions button as the new way to manage your extensions. You can click the gear icon next to an extension or use the right-click context menu to pin the extension to the toolbar (Pin to Toolbar). To (re)move the extension from the toolbar back to the Extensions button drop-down, you can use "Unpin from Toolbar" in the right-click context menu. If you do not have extensions installed then this button takes you to "Tools -> Add-ons -> Extensions".

The regular overflow area (>>) can only be used for built-in Firefox toolbar buttons as shown in the Customize palette and can no longer be used for extensions. For buttons provided by extensions, the Extensions button drop-down serves as overflow area ("Pin to Toolbar" and "Unpin from Toolbar").

More info:

• https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars
• https://blog.mozilla.org/addons/2022/11/17/unified-extensions-button-and-how-to-handle-permissions-in-manifest-v3/

Thanks for the response. You say it is a "new Extensions button", but it does not take you to "Manage Your Extensions", it takes you to "Personalize Your Firefox". I always use Tools -> Add-ons and Themes to get to the extensions page which is 1 click vs 2.

When I right click Extensions button there is no useful info (see image). This new button seems to have not been thought out well.

You need to left-click it.

If you do not have extensions installed then the puzzle piece button takes you to the about:addons page like happened previously.

• https://support.mozilla.org/en-US/kb/extensions-button