Firefox 145 installed, and all the extension buttons in the toolbar are gone. "Customize" does not allow to put them back (as it only lists the Firefox-native buttons).

Funnily, the extensions were still listed as active on the extensions page.

What worked is to remove and re-install the extension - but only to a point: Only the last two installed extensions are shown in the toolbar.

As I have strict privacy by default (i.e., ublock, noscript, etc.) I need quick access to the extensions to loosen the restrictions on certain pages/for certain domains. The extensions menu is not acceptable for me.

How can I put more than two extensions in the toolbar of Firefox 145?

Alternatively, how can I revert back to FF 144? The installer which was listed on Mozilla's donwload page for 144 did install 145 again :-(