It is possible that it's the first post on English part of the forum, so hello, let me introduce myself.

I am Polish player and languages dept member, also participating in promotion of Cantr for Polish users

Some time ago I made Greasemonkey script for Cantr (something like plugin or addon) available for Polish players. In my opinion it was useful so I decided to translate it to English. I've tested it with Firefox and Chrome, I was informed that works with Opera.
Script contains some useful improvements:
www.cantr-mmorpg.pl wrote: Labels for containers
Events filter
Clock with tick notification
Buildings and vehicles bookmarks
Dynamic calculator of input resources and time needed in certain project
Land vehicles and ships grouping
Note preview when editing; “characters left” counter
Replacement of panels on the “location” page – button “leave the building” is above the description
Some [max] buttons on the pages “take-” and “give resources”
Checkbox autochecker
Objects list for copypasting (since 0.60.0)
Machines grouping on the OBJECTS page (since 0.60.0)
Detailed list of features in English and link to download is accessible here:
http://cantr-mmorpg.pl/english/cantr-enhanced-script/These features are aimed to deal with the biggest problems of the Cantr interface, mostly to save time and make players happier

In my opinion it could not give any advantage in violence.
Of course I can't guarantee that it will always work exactly as meant to, so it is better to disable it when doing something risky.
Some facebooks users have already seen that

I can translate it to other languages. If you want to help, contact me using PM or IRC.