Question about Firbebug-lite

[shtefcs]

I am researching about DOM manipulations for my team (front and back end developer), I am not developer but I read alot, research and understand techology.

My question is next:

Can we for example load some website into iframe in our APP, and then manipulate DOM by, editing, deleting, drag and dropping elements ? I saw many kind of examples in Website Builder apps, or on Optimizely.com https://www.youtube.com/watch?v=0S0IrbwpfzE .

Any help or points welcome. Also, developer with Ractive and DOM experience are welcome for paid work.

Peace,