I don't know if it's worth it for you developers, but I miss a feature that practically no browser has, which is the image translator. Only Yandex's browser has this native feature. It translates not only the page itself, but also the images. However, the downside is that it doesn't work very well. Maybe it's because it's their own Translator? I don't know. But I do know that if they add this feature to the browser, it will attract a lot of comic readers.
Even Google has a beta feature, but in the CCT. It translates in real time instead of on the page (I saw it in a Reddit video working).