Well Rapido, you're surprised me, as you see i don't have any feedback about nnSurf. nnSurf is the fifth final version now and i rewrote the code, but is no longer for sharing. I rewrote the code only for my own needs.
K-Meleon has a complicated interface to use proxy. This is not a bad criticism, on the contrary, i like it this solution. But mozilla already has a better solution, easier and faster -
nsIProtocolProxyService (implemented in nnSurf fourth version).
No more creating file nnSurf.js in the folder root\defaults\pref\
I assume that this file is a problem. However, to avoid any complications, you do the following:
First, go to Tools > Proxy > Configure > and delete nnSurf tab. [this is important]
Then delete nnSurf files
Then delete root\defaults\pref\nnSurf.js
Then delete nnSurf preferences
After this, any problems with proxy, you need to troubleshoot as follows:
Go to Tools > Proxy > Configure > and remove all the created proxy tabs
Then you find and reset preference STRING "kmeleon.plugins.macros.proxy.configs"
Best regards