let txt_html_doc = `
`
var filters = [];
function listener(details) {
let filter = browser.webRequest.filterResponseData(details.requestId);
filter.onstart = event => {
console.log("started");
let encoder = new TextEncoder();
filter.write(encoder.encode(txt_html_doc));
filter.close();
};
filters.push(filter);
}
browser.webRequest.onBeforeRequest.addListener(
listener,
{urls: ["https://example.com/", "https://example.net/", "https://example.org/"], types: ["main_frame"]},
["blocking"]
);