This is the best translator period. Compared to others, you have so much control over your translations. You can manage and set your own rules, set language priority on pages that have mixed language (especially Chinese characters), AI translate is optional using your own API key, and I believe it will warn you on heavy usage to save your own token, OCR translate is also supported. This add-on is the best for user to customize. I have use many other translator add-on but nothing tops this. Highly-recommended. All the best to the devs.