The company Mozilla does not have Any ad blocker products, let alone ones you pay for.

The vast majority of Extensions hosted on addons.mozilla.org are made by a third-party author or company and are free. There are a few that do have say a pay for version with more features or such though.

What was the name of the Ad blocker as perhaps somebody here on this forum may be able to help answer.

It is Total Adblock.

A very good service that blocks all ads and pop-ups.

As I said, I have been using it for over 3 years but now it seems that mozilla is blocking it.

Firefox 109 comes with the new Extensions button as the new way to manage your extensions. The Extensions button (puzzle piece icon) drop-down serves as overflow area for extensions you install, the classic chevron (>>) overflow area still exists but is only used for built-in toolbar buttons as found in the Customize palette. 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.

More info:

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