I am trying to solve a long term 'Web Content uses too much CPU and slows down the computer' issue and for that I have just read through some support articles including https://support.mozilla.org/en-US/kb/performance-settings. Now, it states: "having too many content processes can slow down your computer, and consequently, Firefox". By default I read this as a cpu issue. On the other hand, it also states: "Additional content processes can improve performance when using multiple tabs, but will also use more memory. " So my question is, does a high content process limit can also lead to high cpu usage or only to high memory usage?