why can' i see some extensios in toolbart

Firefox changed this a while back, so extensions don’t always show up in Customize Toolbar anymore. They’re usually kept under the Extensions button, the little puzzle-piece icon near the address bar. Click that button, find the extension, then click the gear or three-dot menu beside it and choose Pin to Toolbar. That should put the icon back up top. (Mozilla Support ) If Pin to Toolbar isn’t there, that particular add-on may not provide a toolbar button. Some extensions only work in the background or through their settings page. Also make sure you’re checking the menu beside the extension in the toolbar’s Extensions panel, not the gear inside Add-ons Manager, since those are two different menus.