You simply have to click on it, then on the Settings icon and under "Manage Extensions" is "Remove Extensions". If this does not answer your question please write again.

The extensions button on the toolbar was added in Firefox 109 and is used to access and manage your enabled extensions. Firefox does not provide a way to remove the extensions button. Although there's an advanced preference to disable the unifiedExtensions feature, this is not supported. See this article for more information: Manage your extensions using the extensions button in the toolbar

You simply have to click on it, then on the Settings icon and under "Manage Extensions" is "Remove Extensions". If this does not answer your question please write again.

Thanks. I found the solution :

In about:config, extensions.unifiedExtensions.enabled change true to false.

The extensions button on the toolbar was added in Firefox 109 and is used to access and manage your enabled extensions. Firefox does not provide a way to remove the extensions button. Although there's an advanced preference to disable the unifiedExtensions feature, this is not supported. See this article for more information: Manage your extensions using the extensions button in the toolbar

Thanks.

Later this year extensions will move their manifest from MV2 to MV3. With MV3 you have more control on what pages the extension is active (enabled) and you need to allow the MV3 extension for each origin. The new Extensions button provides the UI to manage those permissions and enable the extension and without this button MV3 extensions will be dead (disabled) on all webpages.

• https://blog.mozilla.org/addons/2022/11/17/unified-extensions-button-and-how-to-handle-permissions-in-manifest-v3/

Sooner or later the 'solution' you have chosen will stop extensions working.

Later this year extensions will move their manifest from MV2 to MV3. With MV3 you have more control on what pages the extension is active (enabled) and you need to allow the MV3 extension for each origin. The new Extensions button provides the UI to manage those permissions and enable the extension and without this button MV3 extensions will be dead (disabled) on all webpages.

• https://blog.mozilla.org/addons/2022/11/17/unified-extensions-button-and-how-to-handle-permissions-in-manifest-v3/

It would still be nice to be able to move the button to the overflow menu.

See

https://connect.mozilla.org/t5/ideas/please-let-us-move-the-new-extensions-button-into-the-overflow/idi-p/22979