VocabTracker

If you upload your ebook to https://www.neat-reader.com/webapp#/ you can then use the vocabtracker chrome extension to read the ebook with all the image embedding and formatting of the original file. Tested on chrome with epubs in japanese and polish.

Currently VocabTracker supports: Chinese, Simplified and Traditional English French Spanish Italian German Arabic Japanese Russian Korean Dutch Ukranian Latin Polish

It is easier than ever to read epubs on neat-reader.com with the vocabtracker extension.

This tampermonkey script which will autoremove furigana (and okurigana) and make vocabtracker work as normal (I am still in a dialogue with vocabtracker to figure out a way to include this to the chrome extension):

https://greasyfork.org/en/scripts/470976-remove-furigana-neat-reader

If you have a tablet and want to use vocabtracker, there is unfortunately no app yet (in development, maybe a 2023 release or so Ive heard), however you can use vocabtracker in the device browser, as well as the extension in browsers such as Kiwi (so you can read ebooks using neat-reader as mentioned in previous posts). One problem with this is a lack of out-of-the box sentence selection since selecting more than one word on a touch screen results in a pop-up menu that doesnt register the words with the vocabtracker sidebar (known but unsolved problem for the VocabTracker team). One workaround I have found is to connect a bluetooth mouse to the table/phone which allows for sentence select to work like on a pc.