Vote bot (thumb bot) for Yahoo News comments section

We had one that utilized the CookieSwap add-on/extension that was modified to rotate through our Yahoo accounts and thumb (both up and down) and also had a Yahoo sign-in feature that would remember the login details for each Yahoo account included in the app. It only worked with the Firefox browser. But two events took place that made the app unusable. First, Firefox started blocking unsigned apps which forced us to install an older version of Firefox that would support/allow the CookieSwap extension, and then soon after that, Yahoo redesigned its comments section format making the program we were using inoperable..If interested, I will provide more details and some screen caps that will give you a clearer idea of what we're looking for.