Hi,
Unfortunately, RA doesn't support JDK 1.8. Please revert to JDK/JRE 1.6 you used before.
I mistook on my previous comment. We need to enable plug-in - not [Java Development Toolkit] but [Java Deployment Toolkit].
I tried to disable JavaScript on my firefox, and then [Launch] button was disabled. So, your problem is related to JavaScript configuration, I think.
My step:
1. Input [about:config] to address bar on Firefox.
2. Set [false] to [javascript.enabled].
3. Restart Firefox and access RA launcher.
And then, there is no responses when I click [Launch] button.
Reverted [true] to javascript.enabled, and then ROC could be launched properly.
Please check javascript configuration in your browser.
Additionally, your security applications may block your browser behavior. If possible, please stop security applications like antivirus and try again.
Thanks
Yas