Rated 4 out of 5 stars

Wonderful! Long awaited integration with KWallet! Thank you for your work!
I noticed one error:
If your username or password contain non-ASCII characters in non-UTF encoding, then the entry in KWallet encoding breaks. Necessary to inspect the page encoding, and make the transformation from it to UTF-16 (encoding KWallet default).
But the inverse is not required (if you enter non-ASCII characters in KWallet, in the form of all displayed correctly)

This review is for a previous version of the add-on (0.3). 

Thanks for the info, I think it should work now in version 0.4.