function returnRefinedURL(url) {
   return url.replace(new RegExp("=\\w+"),"").replace("?&","?")
  .replace("&&","&")
}

testsAndRequests = []

document.querySelector('.report-waterfall').contentWindow.document.querySelectorAll('.vsc-initialized table .netTable').forEach((table, index) => {
	table.querySelectorAll('.netFullHrefLabel.netHrefLabel.netLabel ').forEach((row, rowIndex) => {
	    if (rowIndex === 0) { testsAndRequests.push([]) }
	    testsAndRequests[index].push(row.textContent);
	})
})

firstTestRequests = testsAndRequests[0].map(returnRefinedURL);
secondTestRequests = testsAndRequests[1].map(returnRefinedURL);

console.log('In A not in B: ', firstTestRequests.filter(x => !secondTestRequests.includes(x)));
console.log('In B not in A: ', secondTestRequests.filter(x => !firstTestRequests.includes(x)))