[spinny]

if the code for the web app is available (assuming a license that permits it) there is no need to use an extension to copy a component. you got the source code

if the code is not available, very likely you will not have permission to use it.

Don't see a legal usage of this kind of tool in a commercial context. Pretty useful as a learning too though

[maxboone]

I don't think that's entirely valid, you can point a camera to a playing movie but that doesn't waive any copyright.

[cuddlecake]

I feel like "availability to copy" or "inspectable" is not a reason to abandon Copyright protection.

After all, it is currently the nature of web software that the source code must be available (for browsers to interpret)