Usually Android ads are embedded in the apps. Close the app and the ad goes away. Uninstall the app and you won't see its ads again. Just including ads in an application doesn't make it adware.
Adware infects the whole system, displaying popups and installing unwanted extensions in your web browser that follow you around. If FileZilla wants to include ads in the actual app that's one thing, but that's not what people are taking issue with.
Adware infects the whole system, displaying popups and installing unwanted extensions in your web browser that follow you around. If FileZilla wants to include ads in the actual app that's one thing, but that's not what people are taking issue with.