Once inserted on for a page, furigana cannot be removed!!! The icon in the toolbar has no utility at all! Doesn't work on many pages such as amazon pages (just a small part of the top of the page is processed). Makes Firefox VERY slow... And furigana sometimes not exact. Globally, very poor extension!

the new insert furigana is very poor compare to the old one.

old one has many function and customization, here is screenshot. please add these features/function back.

https://imgur.com/zsP2LfN