Assegnate 5 su 5 stelle

For some time now, when I right click on a web page and hover over "Character Encoding", I see:

Auto-Detect
More Encodings
Customize List...

I see nothing else listed.

When I hover over "Auto-Detect", nothing appears.
When I hover over "More Encodings", I get 5 items appear:

West European
East European
East Asian
SE & SW Asian
Middle Eastern

- but when I hover over each of them, nothing appears.

This add-on used to work until a few weeks ago. Maybe another add-on is conflicting with it?

Edit:

After your response to my review, I have updated the "rating" back to "5 stars".

I look forward to the next release.

Questa recensione riguarda una versione precedente (0.2.6.1-signed) del componente aggiuntivo. 

I confirmed this problems in FF 28 and am fixing now. wait some days plez.

Currently, working well until FF 27.x