There are few differences between Firefox35 and the earlier Fx34. What is it that you are noticing and trying to change.

I would strongly advise against downgrading Firefox to an unsafe insecure and unsupported old version.

• Install an older version of Firefox

Once security holes are fixed the fix is publicised and that may be exploited on old versions.

Perhaps a screenshot will help

• How do I create a screenshot of my problem?

You are using an extremely old Shockwave Flash version according to the plugins list.

• Shockwave Flash 10.3 r181

You can find the latest Flash player versions for Firefox on this page:

• http://www.adobe.com/special/products/flashplayer/fp_distribution3.html