As a starting point, you can check the Extensions button menu: Manage your extensions using the extensions button in the toolbar.

If you don't see it listed there, try the Add-ons page. Either:

• click the Extensions button (puzzle piece) on the toolbar > Manage Extensions
• Ctrl+Shift+a (Mac: Command+Shift+a)
• "3-bar" menu button (or Tools menu) > Add-ons
• type or paste about:addons in the address bar and press Enter/Return

In the left column of the Add-ons page, click Extensions. On the right side, find the "Manage Your Extensions" heading. And they should all appear here.

Success?

This question has been locked because the original author has deleted their account. While you can no longer post new replies, the existing content remains available for reference.