I don't use the toolbar but I do use this and it may  come in handy for those who do.
I didn't realize how many services Google had.
 Display all Google services as buttons or as a space-saving dropdown menu next to your address bar or anywhere you like it. Reach services like Gmail, Google reader, Google maps, Google calendar, and many more in a single click from your browser.

Google has canceled its toolbar for the current and future versions of Firefox, and Mozilla is scrambling to help users who might be left in the lurch and postponing their browser upgrades..."

July 22, 2025 Mozilla jumps to deal with Google Toolbar demise | Deep Tech - CNET News