Nice extension but there's one HUGE problem: it opens Wiktionary in the same tab, and there's no going back - the 'back' button simply turns gray

Problem: It opens the tab BEFORE the current tab (left of the current tab). This behaviour is weird. FireFox opens new tabs after the current tab (right).

Suggestion: Reuse existing tab. Say that I opened "dog" with this extension. Now if I open "cat", it opens a new tab. If this continues, there will be lots of Wiktionary tabs. If there already is a Wiktionary tab that this extension has opened, why not reuse the same tab?