Rated 1 out of 5 stars

I have the same qt5.7 library problem that others have reported. Gentoo is currently at qt5.6, with quite a few blocking bugs for qt5.7. So I pulled the subversion repo and built it, which was happy with my qt5.6 but only delivered plugin version 1.2. I have FF49 installed and apparently there's bug fixed by 1.3 that I need. I haven't been able to go any further.
Side note: The contact form on the developer home page requires a captcha solved, but no captcha was displayed for me.