I found solution, but the issue is script doesn't work if devtools are closed.
`chrome.devtools.panels.create("Request interception", "icon.png", "panel.html", panel => {
chrome.devtools.network.onRequestFinished.addListener(
function(request) {
request.getContent((content, encoding) => {
console.log(content)
})
}
);
});`
If there any other way to intercept data or make this script work without opening devtools?