Please add a new functionality: a hot key to replace the selected text with a translation without a pop-up.

Good

I highlight text, I get a little button to translate it, and it translates it in a little box. It just works.

No surprise features. No adware. No redirects to Google Translate in a new tab. Works as advertised.

The best translator for Firefox.

Really nice and simple

addons.mozilla.orgだとなぜか「選択したテキストを翻訳」のショートカットを押しても翻訳パネルが表示されないです。