You can find information on the Debian maintainer/uploaders at https://tracker.debian.org/pkg/foxyproxy . I would get in touch with them.
Scott K
- Bug#917479: RM: foxyproxy -- RoQA; Broken with Firefox ... Moritz Muehlenhoff
- Bug#917479: Removed package(s) from unstable brent s.
- Bug#917479: Removed package(s) from unstable Scott Kitterman
