Quicktime does not exist on Android. The site would need to be updated to work with modern browsers.

Thank you but what can I do now ? How can I enable this plug in in Android Mozilla browser so that audios and videos will be watched?

paul00... said

Thank you but what can I do now ? How can I enable this plug in in Android Mozilla browser so that audios and videos will be watched?

Again there has been no Quicktime Plugin made for the Android OS.

You sure it is asking for Quicktime and not Flash Player? https://support.mozilla.org/en-US/kb/how-do-i-watch-flash-videos-firefox-android

About the only useful browser Plugin that has been made for Android was the Flash Player from Adobe which has been discontinued with last 11.1.x version from Adobe being released back September 10 2013. I was made for the ARMv7 cpu's and not newer cpu's like Intel or ARMv8 etc.

It is old and vulnerable now and many websites does not support the old Flash Player branches like the 11.1 for Android and BB Playbook and even the 11.2.x still supported for Linux.