Very nice indeed, however, after clicking on "Translate With Reverso Context Web Version" and scrolling down the popup window freezes/crashes Firefox 57. The popup window appears when" Activate Translation Shortcuts" is selected in Reverso Settings.

Also the shortcut Icon "Short Cut Next To Word" produces nothing just a blank Reverso popup.

Please fix these issues. Thanks.

Edit: just in case, I disabled all my addons except Reverso, and the same thing happens.