Hi, tiredDragon. Thank you so much for your comments.

Firstly, I am sorry I may not be able to add more words because I found those words from an online database. However, you can find more words by simply changing the JLPT level ("about:addons" page in Firefox). What's more, the grammar point could be the same but the example sentence might be different.

Secondly, it may run into a sentence splitting problem to romanised all transcripts. Unlike English, Japanese sentences don't have spaces between words. Frankly, getting used to reading kana may help you learn Japanese faster.

Thank you again for using this add-on and have fun learning Japanese!