According to the St. Clair Software Blog, version 2.7.6 focused on refinement and stability:
Users typically utilize App Tamer 2.7.6 to prevent "runaway" background processes (like web browser helpers or cloud sync agents) from causing the cooling fans to spin up or the battery to drain prematurely. Unlike built-in macOS features like App Nap, App Tamer provides manual, granular control over almost any running process. App Tamer 2.7.6
Completely pause an application when it is not the frontmost window. According to the St