Comment by inigyou
10 hours ago
DLLs are hopefully shared. But when you run a JavaScript interpreter and load some JavaScript library, in several different processes, that is not shared. Each process gets an independent copy of the library because from the kernel's perspective it's data.
The JavaScript interpreter is shared too since the Plasma Weather app is loaded as a shared library plugin into the Plasma process and uses the functionality already loaded and present in RAM. The same concept is used with background services which run in the kded process. There is no need to have a set of full web browser processes per service.