It would be great if it worked on pages like "about:epubreader"
On this kind of page, or any page that is not a normal website, hotkeys are always activated, so one can't type "s, w, k, ..." and doing so results in accidental changes.
I have added the French dictionary, but I don't see how to switch dictionary. It is not listed in the dictionaries tab in perapera options. It would be great to have a way to add dictionaries manually.
The wordlist does not remember words upon reopening the list (well, sometimes it does but only for a couple of words or so, which indicates that something's not working as it should)
It seems not to work with multiprocess Firefox.
Finally, it would be nice to have the option to make Chinese characters larger.
Great extension overall. Thanks