[arch-general] opinion request about Firefox add-ons

Hi. Firefox 44.0 does not seem to allow installing the firefox-adblock-plus addon package from the Arch community repository. Instead, Firefox states that it only allows addons "signed" by Mozilla to be installed. That seems to exclude the package mentioned. I could install the adblock-plus addon version available from Mozilla, directly through Firefox. But is this okay, or a bad idea, or is there a better idea? Any opinions?