I came across a Error with a new laptop while opening the forms.
I had java 1.6 update 27 and firefox 34. When I tried to open java it was not opening after trying some things then my forms was opened.
Below are the steps
1.Remove all Java versions. Try to install current version of java in my case it is 8 update 172
2.Try to have Firefox ESR version or Recomended IE version. In my case Firefox ESR 52.8.0
3. Disable TLS in Java: In newer Java Versions you have to disable by, Go to Java control Panel> Goto Advanced Tab> Click General or Security Tree. > If you see TLs 1.1 or TLS 1.2 uncheck them.
4. In Internet Explorer Go to Internet Options> Advanced> Scroll down to Security Disable / Un check all Use TLS 1.0, Use TLS 1.1 and Use TLS 1.2.
Note: Firefox ESR 60 will not support java plugin as of now.