You can drag "Bookmarks Toolbar Items" next to the address bar see https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars https:/

You can drag "Bookmarks Toolbar Items" next to the address bar see https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars https://support.mozilla.org/en-US/kb/customize-firefox-contr... And then you can put bookmarklets into that.