Rated 4 out of 5 stars

Wow, this Add-on would be super helpful, but it has some serious (UI) issues. First of all it made crash Firefox 28 several times after I haven't installed KeyPass beforehand.
After installing KeyPass and then KeeFox it got better, but in case of UI issues the settings on notifications doesn't seem to hinder Keefox from constantly telling to load database. The icons/notifications are far from Firefox UI standards. The German translation has several misleading sentences and typos. Still, I'm happy to use it, but a non-tech-person would probably lose trust in this add-on from the experience given.

This review is for a previous version of the add-on (1.3.1.1-signed). 

Thanks for your suggestions to improve the translations. Hopefully version 1.4 will address most of your concerns. I don't think that KeeFox can be responsible for Firefox crashes but if you can replicate a conflict with another add-on or program, feel free to post about it on github so we're at least aware of the issue and can investigate possible workarounds to help others in a similar situation.