AFAIK, that’s a browser feature, not a site one. You can check that by going to https://interactive-examples.mdn.mozilla.net/pages/tabbed/textarea.html https:/

AFAIK, that’s a browser feature, not a site one. You can check that by going to https://interactive-examples.mdn.mozilla.net/pages/tabbed/textarea.html https://interactive-examples.mdn.mozilla.net/pages/tabbed/te.... If you can resize that, your browser is doing that for you.