Be careful with old versions!
These versions are displayed for reference and testing purposes. You should always use the latest version of an add-on.
This emergency release fixes a problem in 2.5.1 whereby FoxyProxy, when being upgraded from the previous release (2.4.1), would corrupt SOCKS port numbers. This led some people to believe that SOCKS support was broken in 2.5.1. Please accept my apologies for the broken 2.5.1 release. It has been removed from this site. This release--2.5.2--has been more thoroughly tested for upgrade bugs.