If you want to see what this does, navigate to https://www.google.com/ in Chrome and paste this into your DevTools console:

    chrome.runtime.sendMessage(
        'nkeimhogjdpnpccoofpliimaahmaaome', {
            method: 'cpu.getInfo'
        }, response => {
            console.log('CPU Info:\n', JSON.stringify(response, null, 2));
        }
    );

I got this:

    {
      "value": {
        "archName": "arm64",
        "features": [],
        "modelName": "Apple M2 Max",
        "numOfProcessors": 12,
        "processors": [
          {
            "usage": {
              "idle": 26879793,
              "kernel": 5270058,
              "total": 42511068,
              "user": 10361217
            }
          },
          {
            "usage": {
              "idle": 27925505,
              "kernel": 5045974,
              "total": 42900999,
              "user": 9929520
            }
          },
          {
            "usage": {
              "idle": 29153545,
              "kernel": 4688719,
              "total": 43152989,
              "user": 9310725
            }
          },
          {
            "usage": {
              "idle": 30140852,
              "kernel": 4360719,
              "total": 43319960,
              "user": 8818389
            }
          },
          {
            "usage": {
              "idle": 34426211,
              "kernel": 2169516,
              "total": 43433582,
              "user": 6837855
            }
          },
          {
            "usage": {
              "idle": 38586206,
              "kernel": 1338183,
              "total": 43658789,
              "user": 3734400
            }
          },
          {
            "usage": {
              "idle": 41067872,
              "kernel": 598226,
              "total": 43874597,
              "user": 2208499
            }
          },
          {
            "usage": {
              "idle": 41795321,
              "kernel": 412479,
              "total": 43965499,
              "user": 1757699
            }
          },
          {
            "usage": {
              "idle": 34484688,
              "kernel": 2180147,
              "total": 43500079,
              "user": 6835244
            }
          },
          {
            "usage": {
              "idle": 38604714,
              "kernel": 1340358,
              "total": 43680869,
              "user": 3735797
            }
          },
          {
            "usage": {
              "idle": 41086212,
              "kernel": 599273,
              "total": 43883401,
              "user": 2197916
            }
          },
          {
            "usage": {
              "idle": 41802500,
              "kernel": 411499,
              "total": 43970596,
              "user": 1756597
            }
          }
        ],
        "temperatures": []
      }
    }

This won't work on non-Google URLs.