ZendeskAutoRefresh — Luca Brian

This add-on let's you automatically refresh the Zendesk ticket page without refreshing the whole tab which removes filters etc.
You can set the refresh interval when clicking on the add-on icon in the browser.

You can find the code on Github so it can be validated by IT departments to be allowed in companies with strict security requirements.
Github link: https://github.com/LucaBrianPTW/ZendeskAutoRefresh

The same add-on is available both for Firefox and Chromium-based browsers!
Chrome store: https://chrome.google.com/webstore/detail/zendeskautorefresh/ojjhhfnifdigpplpldbppdojpjihgffa